The invention relates to a flow cell power system. The flow cell power system comprises a flow cell or a flow cell set, an anode liquid storage tank, a cathode liquid storage tank, a circulating pump I, a circulating pump II, an electric motor controller and an electric motor, wherein an anode electrolyte in the anode liquid storage tank passes through the flow cell or the flow cell set and is refluxed by the circulating pump I, a cathode electrolyte in the cathode liquid storage tank passes through the flow cell or the flow cell set and is refluxed by the circulating pump II, and the power system can be used for an electric automobile; the anode electrolyte and the cathode electrolyte are subjected to electrochemical reaction in the flow cell or the flow cell set, and chemical energy is converted into electric energy, so that the power can be supplied to the electric automobile; the flow cell power system can be charged by electrolyte replacement or by a charging pile, so that the problems that the existing electric vehicle has short driving mileage and long charging time are solved thoroughly, the electric automobile can be promoted to be popularized, environment protection can be facilitated, and the application prospect is wide.