The invention provides a self-powered pump for heated liquid, a fluid heating and storage tank and a solar fluid heating system employing any one of the two or them both. The fluid heating and storage tank is provided in the building below the solar heat collector in the system, which implements automatic cycling and control of heat only by heated fluid without any external electric power, making the system energy-saving, safe and anti-freezing. The self-powered pump comprises an enclosed container, three pipes led from the container and a bearing container. The liquid heating and storage device includes a storage container for the first liquid, a heat exchanger, two pipes through lateral wall of the container and connected with the heat exchanger.