Based on the fundamental ideas of democratic country under the rule of law, the thesis deems that executing public power requires administration by rule of law. As police officers execute their duties, the use of police weapons is the most forcible and lethal tool among strong measures of obviating danger. Therefore, police officers must pay attention to the occasion and procedure of using their weapons. Because any careless use of police weapons easily harms people¡¦s life, body, freedom, property, rights, and interests, police officers must use their weapons carefully and properly. Scholars have provided lots of valuable opinions about the use of police weapons in the past and the police agency also emphasizes on the importance of correct use of police weapons. Moreover, the thesis discussed many cases about ¡§Correct use of police weapons,¡¨ ¡§Improper use of police weapons,¡¨ and ¡§Illegal use of police weapons¡¨ of police officers to offer responsibility problems which involve illegal use of police weapons possibly; expects the behavior of using police weapons can conform to law, order and human rights more to enhance the quality of using police weapons. In other words, making police officers use their weapons more correctly through the research on legal system of use of police weapons use can ensure not only rights and interests of common people, but also of police officer themselves. To view the thesis, ¡§A research on legal system of use of police weapons,¡¨ it mostly expounded with views of administrative law and analyzed and discussed according to five frames, including basic principles of legal system of use of police weapons of administrative law, legal system of administrative organizations, legal system of administrative limits of authority, legal system of administrative relief, legal system of administrative supervision. The thesis has seven chapters and the gist of each chapter is set forth as below: Chapter 1 Introduction- It introduced the motive, objective of the research, research scope and limits, research frame and methods, relevant phrases explanation, and literature review. Chapter 2 Basic Principles of Legal System of Use of Police Weapons- It simply discussed basic principles of use of police weapons, internationalism, spirit of law and order, and participation of person concerned. Chapter 3 Administrative Organizations of Legal System of Use of Police Weapons- It explained basic concepts of administrative organizations, administrative organization frame of legal system of use of police weapons, funds of legal system of use of police weapons, personnel system of legal system of use of police weapons. Chapter 4 Authority Design and Application of Legal System of Use of Police Weapons- It introduced administrative plans of legal system of use of police weapons, administrative legislation of legal system of use of police weapons, administrative disciplinary action of legal system of use of police weapons, administrative investigation and instant enforcement of legal system of use of police weapons, administrative contract of legal system of use of police weapons, assured means of obligation performance of legal system of use of police weapons, and administrative procedure of legal system of use of police weapons. Chapter 5 Relief and Aftercare of Legal System of Use of Police Weapons- It described the meaning, types of administrative relief of legal system of use of police weapons, petition, appeal, administrative lawsuit, national compensation, constitution interpretation, and plebiscite. Chapter 6 Supervision and Evaluation of Legal System of Use of Police Weapons- it introduced the outline of administrative supervision, internal and external supervision mechanism of legal system of use of police weapons. Chapter 7 Conclusion and Suggestion- It summarized findings of the research and set forth personal suggestions based on them for reference