College Entrance examination as an important means of selecting future talents in China, has become the focus of national, social and parent candidates. In addition to the college entrance examination results, voluntary chioce of college entrance examination is also the most important part in the follow-up stage of college entrance examination, directly related to the future of the candidates. This paper first expounds the necessity and present situation of college entrance examination consulting service, then summarizes the existing voluntary choice system in China, after that, investigates the two special college entrance examination voluntary choice service institutions on the market, and analyzes its advantages and disadvantages. Finally, the existing voluntary choice problem is summarized and the solution is put forward.