The invention relates to a computer radiating system which comprises a case. The case comprises a casing and a radiating assembly. The radiating assembly comprises a water channel, a water feeding pipe, a water tank, a water discharging pipe, a water flow adjusting assembly, a cooling plate and a fin group. The water discharging pipe and the water flow adjusting assembly are arranged on two sides of the water tank. The water flow adjusting assembly comprises a round water pipe and a partition plate. The partition plate is arranged in the water pipe, the middle axis of the water pipe is located on the plane of the partition plate, one side of the partition plate is connected with the pipe wall of the water pipe in a sealing mode, a gap is formed between the other side of the partition plate and the pipe wall of the water pipe, a water inlet and a water outlet are arranged in the water pipe on two sides of the partition plate, the water inlet is connected with the water feeding pipe, and the water outlet is communicated with a cooling cavity. The computer radiating system adopts the waterfall type water cooling mode to conduct heat exchange in the case, improves the computer radiating speed, omits a fan, reduces noise, omits air ports, and achieves a good dustproof effect.