Exploitation and utilization of the new energy is becoming the main trend of the world energy utilization.Solar energy project investment has become the major energy investment field in each country. According to the characteristics of solar energy investment, this paper selected and designed indicators, considering the benefits (B), opportunities (O), costs (C) and risks (R), and build a solar energy Investment Project Evaluation system adopting AHP, and it makes a comprehensive and objective judgments on solar energy Investment projects, effectively measures the relationship between advantages and disadvantages of investment programs.