The present invention proposes a refrigeration system (100). The refrigeration system (100) comprises a compressor (110), a condenser (120), a reservoir (130), a throttling device (140), and an evaporator (150) connected in sequence through pipes, as well as a cooling device (160) for cooling high-temperature components (10). The cooling device (160) has a heat exchange container (161) and a flow pipe (162), where the heat exchange container (161) maintains fluid communication with the reservoir (130) through the flow pipe (162), and the heat exchange container (161) is used to absorb heat of the high-temperature components (10). The heat exchange container (161) receives liquid refrigerant from the reservoir (130) through the flow pipe (162), the liquid refrigerant in the heat exchange container (161) generates vapor after heat exchange with heat absorbed from the high-temperature components (10), and the vapor enters the reservoir (130) through the flow pipe (162), thus forming a circulation loop. The present invention also proposes a refrigerator van configured with a refrigeration system. The cooling device in the refrigeration system (100) can cool the high-temperature components (10) in an efficient and energy-saving manner.