Abstract: With the development of the solar photovoltaic technology in recent years,high-precision position of the sun tracking technology is more and more important．But general sensors under the condition of guarantee the high precision tracking range is ignored,it results in that the tracking range of sensors often appear small search less than the sun.In order to guarantee the photoelectric sensors in such aspects as scope of tracking,tracking accuracy and meet the requirements,the paper put forward a kind of design method as the control core of tracking control system based on S3C2410development board,it adopted photoelectric tracking and sun angle tracking,complementary cylinder sensor structure.Using database is used for recording the daily weather condition’s solar trajectory,the system can effectively improve the solar energy collection and utilization efficiency,it can expand the tracking range of the sun．It has good application prospect.

Key words: Embedded,Photoelectric tracking,Sun angle tracking,Database