Propose a solution, it include that booster and at least one supply station provide medical fluid to booster for operating spraying system, supply station includes at least one socket, for accommodating the medical fluid, a kind of container that distributor is in fluid communication, medical fluid is transmitted to patient with booster, and clamping device is associated, and the medical fluid for being used to adjust fluid flowing with distributor passes through output equipment. Method includes the following steps: operation booster is completed until injection process When the second injection process starts before the standby mode of holding spraying system, and booster is operated until the second injection process is completed. The step of standby mode of incubation step spraying system includes acting on the clamping device release time distributor.