The invention relates to the technical field of safe collection of volatile organic compounds (VOCs) in normal pressure and low pressure storage tanks, and discloses a safe collection device for VOCsin storage tanks. The device comprises storage tank groups of various materials, air extraction equipment and oil-gas treatment equipment. According to the device, not only is the fire risk of the storage tanks significantly reduced, but also the gas phase of the storage tanks can be remotely cut off in case of an accident so that the safety of the storage tanks can be guaranteed. Meanwhile, the device achieves the VOCs treatment of the various material storage tanks.