GPS (global positioning system) synchronous photon counting photometric device for astronomical site selection and working method thereof

A GPS (global positioning system) synchronous photon counting photometric device for astronomical site selection is provided with a GPS antenna and a GPS circuit module, wherein the GPS circuit module provides precise reference time and a longtime stable clock source. The GPS synchronous photon counting photometric device is characterized in that the photometric device is provided with a photon detection sensor and a negative high voltage distribution module which are bidirectionally connected; the output of the photon detection sensor is connected with the negative high voltage distribution module so as to form a signal output of the negative high voltage distribution module; a high voltage output of the negative high voltage distribution module is connected with the photon detection sensor; the output of the negative high voltage distribution module is connected with an analog circuit module; the output of the analog circuit module is connected with a digital circuit module; the digital circuit module is co