”As is the principal, so is the student.” The principals are the pilot of schools, so the government should set up the perfect principal preparation system for them to manage their schools' affairs. With the certificate system and refresher programs, the principals will have self-confidence and professional development to stress the quality of education. This article first explores the meanings of the preparation and appointment system. This is followed by an analysis of the trends of preparation and appointment system that focuses on United Kingdom, United States, China, and Singapore. After that, it is discussed the programs change and development of the principal in our country. It is concluded that the suggestions of the important of preparation and appointment programs should be adapted in order to institute our principal preparation and appointment system.