The utility model relates to a solar energy power generation technical field provides a photovoltaic board chases after a day device very much, including the photovoltaic board, light sensor, the bracing piece, the control angle of elevation changes the subassembly, control azimuth angular variation subassembly and total accuse box, set up light sensor on the photovoltaic board, the photovoltaic board is rotationally connected on the bracing piece, the control angle of elevation changes the subassembly and includes screw push rod and angle of elevation motor, angle of elevation electric machine control screw push rod is flexible, screw push rod is connected with the photovoltaic board, thereby the change at the control photovoltaic board angle of elevation, control azimuth angular variation subassembly includes azimuth motor and toothed disc, azimuth motor control gear coils the rotation, the toothed disc links firmly on the bracing piece, thereby the control bracing piece rotates at the horizontal direction, the bracing piece drives the photovoltaic board and rotates at the horizontal direction, total accuse box is according to the start -up of received light sensor's data management angle of elevation motor and azimuth motor and close. This novel photovoltaic board that can make is perpendicular with light all the time under the glazed circumstances, improves the use of solarenergy and rates.