The invention discloses a self-learning type energy-saving water boiler group system and a control method thereof. The system comprises at least two water boilers, information acquisition units, wireless communication units, self-learning type control units and display units. The method comprises the steps that the water boilers record water usage rules of users through the information acquisition units within a certain period of time and transmit the respective water usage rules to each other through the wireless communication units, peak periods, idle periods and non-water-usage periods of water usage are judged according to the rules, and then a reasonable inlet water heating and supply scheme is calculated according to a self-learning algorithm; and the display units of the water boilers display respective water supply states and the water supply states, which are received wirelessly, of other water boilers in real time and put forward a reasonable supply suggestion. According to the system and the control method, a group type drinking water heating and supply method with the self-learning algorithm is adopted, the regional integration is realized, and the system and the control method have the advantages of energy conservation, environment protection, drinking water health and humanization.