Forensic appraisal is a comprehensive subject that includes both law and natural science. It mainly studies the theory and practice of forensic identification, and is the product of the cross-integration of law, natural science, social science and other disciplines. Therefore, forensic science not only belongs to law, but also involves knowledge of natural science.

Forensic appraisal refers to scientific and technological appraisal activities carried out by judicial organs entrusted by professional institutions or experts to solve certain scientific and technological issues involved in cases in accordance with legal provisions. The main task of forensic identification is to study the theory and practice of forensic identification, including the basic principles of forensic identification, identification methods, technical specifications and the writing of identification reports.

In forensic identification activities, knowledge of natural sciences is often involved, such as knowledge in medicine, chemistry, physics, biology and other fields. For example, in criminal cases, forensic identification is one of the important contents of judicial identification. It is necessary to conduct an autopsy on the body of the victim or suspect, analyze the cause of death, and provide strong evidence. In intellectual property cases, technical appraisal is often required to determine the scope of rights of patents, trademarks, and copyrights based on scientific and technological norms and standards.

Therefore, the research scope of forensic science involves knowledge in many fields such as law, medicine, chemistry, physics, biology, etc., and is a comprehensive subject. Although the research on forensic identification mainly focuses on forensic identification, it is also the product of the intersection of law, natural science and other disciplines. It not only belongs to law, but also involves knowledge of natural science. Therefore, forensic identification is not only an important branch of law, but also an important area where science and technology intersect with law.