The invention relates to a three-level high-reliability renewable energy control method and device based on double super-capacitor module groups. The reliable absorption and storage of the renewable energy are carried out through a double-channel independent super-capacitor module group, the maximum-efficiency reliable absorption and storage of the renewable energy in a severe condition and the high-power output compensation of a DC bus can be carried out, and the high dynamic performance of a motor drive system can be improved. Compared with the prior art, a three-level renewable energy absorption device is employed, thereby guaranteeing the complete storage of the renewable energy and achieving the reliable treatment of the excess renewable energy. The method and device can enable the energy to be used quickly and to flow effectively, and solve a problem of simultaneous charge and discharge of a single super-capacitor module group. The method and device employs a dual-redundancy bidirectional DC/DC circuit to solve a problem of a power-down failure and fluctuation of the DC bus. The double super-capacitor module groups are connected in parallel for use, thereby improving the absorption capability of instantaneous large energy and the output capability of instantaneous power.