NOVELTY - The fluid control system has an outflow unit (6) that pours a fluid to a light-receiving surface of a solar power generation module (1). A control unit (5) controls an outflow by the outflow unit. The control unit increases a flow volume of fluid for predetermined time, and it makes it decrease rather than the flow volume behind for predetermined time. The control unit increases an initial stage flow volume of an outflow of the fluid. A temperature detection unit (2) detects a surface temperature of the solar power generation module.    USE - Fluid control system for controlling flowing water system of solar power generation module of solar energy power generation system used in private sectors and industries.    ADVANTAGE - Since a fluid spreads easily to the region which got wet even when it decreased flow volume after predetermined time, the power saving and weight reduction of a fluid can be performed. The foreign materials adhering to the light-receiving surface of the solar power generation module, such as bird droppings, fallen leaves, and snow coverage, can be excluded, so that the decline in the electric power generation efficiency by the partial shade which arises in a solar power generation module can be prevented. The time can cool a solar power generation module rapidly. Since flow volume can be increased to an early initial stage, the period of the effect of power saving, the weight reduction effect of a fluid, and the effect of fall prevention of electric power generation efficiency can be extended to the utmost. The freeze formation can be prevented so that decline in electric power generation efficiency can be eliminated. The usage-amount of a fluid can be restricted and economized, and waste of power consumption can be prevented.    DESCRIPTION OF DRAWING(S) - The drawing shows the block diagram illustrating the structure of the flowing water system of the solar power generation module. (Drawing includes non-English language text)    Solar power generation module (1)    Temperature detection unit (2)    Illumination intensity detection unit (3)    Control unit (5)    Outflow unit (6)