A set of new-style portable autocontrol muti-wavalength sun-photometer based on Visual C++ is introduced, which can be real-time monitored and visualized. It can measure and display instantaneous solar radiation, heating temperature, and temperature of work field as well. It has the on-line detection function of electric engine operation, sun tracing, heating temperature et al. The new-style sun-photometer is portable, adaptable to the abominable environment, smaller and has higher ratio of performance and price. The device is satisfactory according to the analysis of the measurement results. Also the instrument calibration and its application are described.