Trademark query is free, and the query method is as follows: 1. Use online trademark query tools (such as Bajie Intellectual Property Trademark Query), or find a trademark registration agency to query. 2. Log in to the official website of the National Trademark Office for trademark query. However, the official website of the National Trademark Office opens very slowly and is not recommended. In addition: these trademark search methods can meet the needs of individuals to search for information related to a certain trademark, and the accuracy rate is high.