Teacher education is the key to the education quality. For the past years, Taiwan faces dropping of birth rate, the supply and demand of teacher also needs to adjust its function and policy. And the strategy of supply and demand are just one of these important issues. The article analyze the policy of teacher education by the point view of population composition and probe into the state of teacher supply and demand, with its trend of development, then bring related solving strategies. Contemplating the reform and problems of teacher education nowadays, the trend of birth rate dropping plays a key role, and it should be noticed that how to use adequate control strategy, in order to maintain the balance of the market of teacher supply and demand. The researcher would have some suggestions and give reference to the education administration department.