The invention relates to a distribution photometer system comprising a base, a first rotating shaft, a second rotating shaft, a plurality of light signal sampling units and an upper computer, wherein the first rotating shaft is positioned on the base and is also connected with a rotating arm; respective control execution modules are arranged near various execution parts of a distribution photometer; each module is internally provided with a microcomputer and a power supply unit; the modules communicate with the upper computer in a wired way or a wireless way through a three-wire, two-wire or wireless digital signal channel, so that the distribution control can be realized; meanwhile, a digital signal channel and a power supply channel in the rotating arm are conducted to the base through a conductive sliding ring arranged on the first rotating shaft. With the measures, the invention greatly reduces connecting leads in the distribution photometer, reduces the interactive interference and the outside interference among the connecting leads, and improves the reliability and the real-time property for data transmission, thereby improving the control and measuring precision of the system and being convenient to maintain and manage the system; meanwhile, the invention also solves the winding problem of a distribution photometer in the operation process.