Abstract: Achieve real-time monitoring of solar radiation can substantially improve the utilization of solar energy.In this paper, we design a new type of solar radiation detection device using a special properties of corner cube reflector.Based on the corner reflector, this device determines the direction of the incident light by detecting the area and the shape of the effective reflection region.Using ray tracing principle, a theoretical analysis and derivation for the relationship between the effective reflection region and the incident angle are made, a simulation for a specific relationship between them is also presented, which confirm the feasibility of achieving a high precision measurement of solar radiation direction.