Forensic appraisal serves litigation activities, involving the rights of both parties and other public interests of the society, and its credibility building is very important. As an important part of judicial activities, forensic appraisal has the social attributes of science, law and service. In the age of scientific evidence, litigation relies on evidence, and evidence usually relies on forensic appraisal, which has caused the social influence of forensic appraisal to increase year by year. As the number of appraisal institutions gradually becomes saturated, their socialization, marketization, and profitability have brought disordered competition, while forensic appraisal scalpers and negative reports on false appraisal continue, the scientificity and reliability of appraisal opinions have also been disputed among academic community. Disputes among the public, media, and practice circles have caused the credibility of appraisal to fall into many difficulties. Through systematically sorting out the concepts of compliance, credibility, scientific evidence, etc., this article analyzes the real dilemma of forensic credibility construction, introduces the latest concept of the ISO 37301 compliance management system of the International Organization for Standardization, and proposes that credibility construction is a systematic project, which can be carried out in the following multiple dimensions exploration: to use compliance management to improve the standardization of forensic appraisal management, and to use “Daubert Principles” as the framework standard for forensic science/forensic authentication; to use technical standard system construction to enhance the scientific trust of forensic appraisal; to strengthen process management, to strengthen the construction of a credit system, and to comprehensively improve customer satisfaction in forensic appraisal.