This paper puts forward an improved PMU placement model based on 0-1 integer programming algorithm, which has a good adaptability. The 0-1 integer programming algorithm possesses a fast computational speed with accurate and reliable results. By this model, all optimization schemes with minimum PMU values can be got and a corresponding approach of minimizing analog channels PMU numbers is proposed. This method could effectively reduce the cost needed for PMU configuration due to its enormous bus numbers in power system. At last, the validity of this model and its processing methods can be proved by emulation calculations, including IEEE-14 buses system, IEEE-30 buses system and New England 39 buses system. For future researchers, this model can serve as references.