The utility model discloses a self control water supply device which comprises a submersible pump, a storage tank, and a power supply control box. A water level tube is arranged on one side of the storage tank, and a magnetic float is arranged in the water level tube. A control circuit consists of a main circuit and two branch circuits, wherein one branch circuit is an automatic control circuit provided with a magnetic switch to control water level, and the other branch circuit is a manual control circuit. The utility model can effectively control water level in the storage tank and enable easy observation of water level in the storage tank with rapid response, reliable action and easy use. Simultaneously, the utility model solves the problem that: water overflow happens because water supply in city is often carried out at uncertain time at night and can not be heard, thereby not only saving water but also reducing trouble and avoiding affecting rest of neighbors due to tidying up at night.