The current situation of the shortage of resources is becoming increasingly rigotous,looking for a new energy to replace the traditional energy sources has been imminent,but the research of the solar energy of the new energy becomes the current research hot spot because it’s clean and rich.This paper states the photovoltaic power generation combined with the traditional power generation formed joint photovoltaic power generation systems,and discusses the characteristics and structure of joint photovoltaic power generation system and makes the model of joint photovoltaic power generation system based on the hybrid system simulation software HOMER,and calculates the total net present cost(TNPC)then analyzes the economy planning,so as to find out the optimal configuration for the system planning.Then through sensitive variable set to analysis under the condition of the different system configuration status,so as to find out sensitive variable range as well as the corresponding system structure configuration;In the geography choice,the geographical position due to the different regions and even in the same area of the natural resources condition is different,this leads to adapt to different parts of the power supply requirements of power system configuration is different,this article id according to the resource conditions and meteorological data to find a more suitable geographical location which joint photovoltaic power generation systems at.