MRI system cabinet having a cabinet body with electronics and a water cooler with a water cooling loop. The water cooling loop divides the cabinet body into first and second cabinet spaces, and the electronics are along the first and second cabinet spaces. An air cooler is along the central axis of the water cooler and has a fan. A cooling cycle is formed where, on a first side, the fan generates a first air flow, which is sent to the first cabinet space through a first air path, and a second air flow, which is sent to the second cabinet space through a second air path. After flowing through the first and second cabinet spaces, the first and second air flows are guided into the water cooling loop for heat exchange under the suction action of the fan on a second side, and then directed into the air cooler.