The invention relates to a solar and ground source heat pump combined energy supply system and an operation control method thereof. The solar and ground source heat pump combined energy supply system is technically characterized by comprising a solar heat collecting system, a ground source heat pump system and a buried pipe system and being composed of plate heat exchangers, a pump set and switches. The operation control method of the solar and ground source heat pump combined energy supply system includes the steps of calculating equipment parameters of the solar and ground source heat pump combined energy supply system to construct the solar and ground source heat pump combined energy supply system, and carrying out operation control over the heat collecting process, the heat storing process and the heat supplementing process of the solar and ground source heat pump combined energy supply system. Hot water supply requiring time periods of domestic hot water requiring users are analyzed, and by controlling relevant switches and equipment, solar energy and a ground source heat pump are combined to supply energy; and heat in a solar heat collector can be conveyed into soil through the buried pipe heat exchanger system to conduct the heat supplementing process on the soil during time periods when the domestic hot water requiring users do not need hot water supply, and thus the soil thermal imbalance problem caused by long-term operation of an existing ground source heat pump is solved.