The aim of the research is to explore the impact factors that the students of the private high school may consider. By so doing, we can understand the significant points that the private high school students may consider on the one hand and whether there exists any differences among the impact factors of choosing school from their diversity of backgrounds on the other hand. The survey is used in the research as the methodology; a survey tool is designed as ¡§The Impact Factors of the 12th and the 13th Grade Students in School Choosing.¡¨ The participants of the research are the 12th and the 13th grade students in a private school in Kaohsiung City. The data obtained would be further analyzed in terms of descriptive statistics, t-test, one-way ANOVA, and so on. The research discovers that: I. The ¡§curriculum and teaching factor¡¨ is the most significant among the impact factors of the private high school students in their school choosing. II. In the item of ¡§key person¡¦s factor¡¨ of the private high school students in their school choosing, ¡§my own choice¡¨ is the most significant. III. In the item of ¡§curriculum and teaching¡¨ of the private high school students in their school choosing, ¡§teacher¡¦s hardworking¡¨ is the most significant. IV. In the item of ¡§school counseling factor¡¨ of the private high school students in their school choosing, ¡§the peers¡¦ good relationship¡¨ is the most significant. V. In the item of the ¡§environmental equipment factor¡¨ of the private high school students in their school choosing, ¡§the air conditioning in the classroom¡¨ is the most significant. VI. In the item of ¡§the school marketing factor¡¨ of the private high school students in their school choosing, ¡§the reasonable tuition¡¨ is the most significant. VII. The science-majored private high school students consider the ¡§counseling factor¡¨ and the ¡§school marketing factor¡¨ more than the humanities-majored students do. VIII. The male private high school students consider the ¡§curriculum and teaching factor¡¨ and the ¡§counseling factor¡¨ more than the female students do. IX. The private high school students whose father¡¦s education is ¡§more than graduate school¡¨ consider the ¡§counseling factor¡¨ more than those whose father¡¦s education is ¡§college or university¡¨ do. X. The private high school students whose mother¡¦s education is ¡§college or university¡¨ consider the ¡§key person¡¦s factor,¡¨ ¡§curriculum and teaching factor,¡¨ and ¡§counseling factor¡¨ more than those whose mother¡¦s education is ¡§less than the (vocational) high school¡¨ do. XI. The private high school students whose mother¡¦s education is ¡§less than the (vocational) high school¡¨ consider the ¡§school marketing factor¡¨ more than those whose mother¡¦s education is ¡§more than graduate school¡¨ do. XII. The private high school students who live in ¡§the suburban area¡¨ in their school choosing factors consider ¡§the environmental equipment factor¡¨ more than those who live in ¡§the urban area of Fongshan District¡¨ do. According to the results, the research attempts to propose student recruiting strategies for the private schools.