1. Introduction 2. The research on the opportunity of developing low-carbon economy in China suggests that in the 21st century, the ecological environment and climate change, which are crucial to sustainable development, are the biggest challenges facing human society, and low-carbon economy provides us with a new solution. Low-carbon economy will become the main way and the only way to slow down climate change and realize sustainable development. According to Einstein's theory, if circular economy brings sustainable development into "automobile era", then low-carbon economy will bring sustainable development into "aviation era". Needless to say, the low-carbon economy is a great challenge to all countries, including China, but it provides a golden opportunity for human society to build a low-carbon economy and create a harmonious world through international cooperation. 3. The research on the development model of China's low-carbon economy suggests that at present, global climate change characterized by global warming is taking place, which has become a crisis and challenge faced by all countries in the world. Low-carbon economy is the best economic model to reduce greenhouse gas emissions and deal with global warming. This paper analyzes the urgency of developing low-carbon economy in China from three aspects: greenhouse gas emission reduction pressure, energy security and resources and environment. On the basis of summarizing the theory and practice of low-carbon economy at home and abroad, this paper demonstrates the development direction, development mode and development method of low-carbon economy development model from macro, meso and micro levels, that is, taking low-carbon development as the development direction, energy saving and emission reduction as the development mode and carbon neutral technology as the development method. Finally, the paper puts forward some policies and measures to implement the development model of low-carbon economy in China. Research focus ☆ Overview of low-carbon economy theory and practice at home and abroad ☆ Overview abroad ☆ Overview at home ☆ Urgency of developing low-carbon economy in China ☆ Pressure of greenhouse gas emission reduction ☆ Energy security ☆ Resources and environment ☆ Taking low-carbon development as the development direction ☆ Macro ☆ Meso ☆ Micro ☆ Taking energy conservation and emission reduction as the development mode ☆ Macro ☆ Mes ☆ Low-carbon fossil energy ☆ Setting up a carbon fund ☆ Establishing a national carbon trading mechanism ☆ 4. Research on the ways to build a low-carbon city suggests that under the background of global response to climate change, the concepts of low-carbon economy and low-carbon city came into being. Its core is to reduce energy consumption and carbon dioxide emissions, revealing that low-carbon economy is the trend of world development and low-carbon cities are the inevitable process of low-carbon economic development. Explain the ways to build a low-carbon city: application of new energy technology, application of clean technology, green planning, green building and low-carbon consumption. And elaborated the practice of low-carbon city in China. Research Focus ☆ Practice of Low-carbon City in China ☆ Application of New Energy Technology ☆ Application of Clean Technology ☆ Green Planning ☆ Green Building and Low-carbon Consumption 5. China's preparation for the transition to a low-carbon economy suggests that low-carbon economy is a new economic development model proposed by developed countries to cope with global climate change, and it emphasizes obtaining greater economic output with less greenhouse gas emissions. At present, it is becoming a new international trend, affecting the economic and social development process of all countries. As a developing greenhouse gas emitter, China is facing specific constraints and certain potential advantages in the process of transition to a low-carbon economy. In the complicated international political and economic environment, China needs to participate constructively in the process of coping with climate change, and actively prepare for the transition to a low-carbon economy in terms of development strategy, policy mechanism and technological innovation. Research focus ☆ development strategy ☆ policy mechanism ☆ technological innovation 6. Technological progress is the key to developing low-carbon economy. Developing low-carbon economy and coping with global warming have become the theme that the world pays close attention to. Focusing on the environment of developing low-carbon economy in the world today, the necessity and importance of developing low-carbon economy, the bottleneck of developing low-carbon economy and other issues, this paper analyzes and points out that the transition to low-carbon economy has become the general trend of world economic development; Fossil energy consumption will continue to grow, and the situation of greenhouse gas emission reduction is grim; It is urgent to develop low-carbon economy, and technological progress is the key to develop low-carbon economy, but the technical bottleneck problem still exists for a long time. 7. The development process of developing national low-carbon economy and its enlightenment to China suggest that the development of low-carbon economy has been paid more and more attention by the international community under the international background of climate issues. Developed countries have had some experience in developing low-carbon economy. As the largest developing country, China plays an important role in the process of dealing with global climate problems. How to find a low-carbon economic road suitable for China is a key issue today. This topic introduces the development process of low-carbon economy in developed countries in recent years, and analyzes their enlightenment to the development of low-carbon economy in China. 8. Actively implementing energy conservation and emission reduction to promote the development of low-carbon economy suggests that a low-carbon economy based on low energy consumption, low pollution and low emissions is a great progress of human society, and foreign countries have taken various measures to develop low-carbon economy. Environmental deterioration and energy shortage will be the biggest bottleneck in the development of our country in the future. It has become an irreversible trend for China to actively implement energy conservation and emission reduction, promote the development of low-carbon economy and build an ecological and civilized society. How to achieve low-emission and low-energy growth in the future development of China requires active strategic planning and countermeasures, especially policy and legal support and guarantee. 9. The key points of developing low-carbon economy in China suggest that China, as a developing country, still needs to focus on realizing low-carbon oriented new industrialization (production mode), new modernization (consumption mode) and new urbanization with integration function. 1. The research on the countermeasures of developing low-carbon economy and clean development mechanism in China suggests that in view of the climate change and carbon emission reduction issues that are widely concerned by the international community, the topic introduces low-carbon economy, clean development mechanism and the basic ways to realize low-carbon economy, quantifies the potential of carbon emission reduction, analyzes the ways of carbon emission reduction in power and steel industries, and finally puts forward the countermeasures of developing low-carbon economy and clean development mechanism from two aspects of project technology development factors and external environmental factors. 11. China's measures to develop low-carbon economy suggest that according to the current situation of China's energy consumption and CO2 emission, we should carry out work from five aspects: industrial structure adjustment, energy structure adjustment, scientific and technological innovation, consumption process optimization and policy and regulation support, and expound the measures that can be taken in all aspects. Research focus [China's energy consumption and CO2 emission status] ☆ Energy consumption status ☆CO2 emission status [China's development of low-carbon economy] ☆ Industrial structure adjustment ☆ Energy structure adjustment ☆ Technological innovation ☆ Optimization of consumption process ☆ Policy and regulation support [China's measures to develop low-carbon economy] ☆ Industrial structure adjustment ☆ Energy structure adjustment ☆ Technological innovation ☆ Optimization of consumption process ☆ Low-carbon economy is the key link to reduce "carbon" emissions and solve this problem. However, eco-industrial park is an important way to realize low-carbon economy. 12.2 Development and Innovation of Low-carbon Building Technology in China Abstract Low-carbon economy originates from energy saving but is higher than energy saving. Low-carbon economy is a challenge to us, but it is also an opportunity to develop building energy efficiency to a higher stage. We should constantly study the technologies of low-carbon buildings, and the thinking methods, design ideas, technical measures and codes of conduct should also climb to a higher level. In this way, once China has to undertake emission reduction obligations, we will not be passive, nor will we achieve carbon dioxide emission reduction by increasing construction costs and lowering the quality of life.