Storage box capable of pressurizing working medium and storage box system

The invention provides a storage tank capable of pressurizing a working medium and a storage tank system. The storage tank comprises a storage tank and a pressurizing unit, a soft bag is arranged in the storage tank and divides the storage tank into a liquid cavity located on the upper side and an air cavity located on the lower side. A vacuumizing opening, a working medium inlet and a working medium outlet are formed in the upper side of the liquid cavity, and each of the vacuumizing opening, the working medium inlet and the working medium outlet is of a closed structure; the lower side of the air cavity is communicated with a pressurizing unit; and the liquid cavity is in a vacuum state. According to the device, the storage tank is divided into the liquid cavity and the air cavity through the soft bag, meanwhile, air in the liquid cavity is pumped out through the vacuumizing opening, and a working medium is prevented from being mixed with air during filling; and the pressurizing unit is communicated with th