The system of laser spot survey which adopts the photoelectric detector arrays is introduced. This system which has high reliability and strong antijamming ability can be used to obtain in real time the shape information and the shape center position of the laser spot on target,absolute time and relative time that the laser pulse arrive on the target. It is applicable in appraising objectively the performance of the long distance laser equipment that is similar to the laser target designator and in measuring the long distance laser information field of laser communication. And the system has referenced value in measuring the laser beam spot with big area.