Automatic control energy-saving method and system for central air conditioner, computer equipment and storage medium

The invention discloses a central air conditioner self-control energy-saving method and system, computer equipment and a storage medium. The method is applied to a central air conditioning system and comprises the steps that the air volume of a fan coil is controlled according to the current indoor temperature, and when the current indoor temperature reaches the corresponding preset condition, the opening degree of a three-state floating point valve in the fan coil is controlled so as to control the temperature difference between chilled water supply and return water in the fan coil; and/or, the opening degree of a fresh air chilled water valve in the fresh air conditioner cabinet is controlled according to the current air supply temperature of the fresh air conditioner cabinet, and the operating frequency of a fresh air fan in the fresh air conditioner cabinet is controlled according to the current indoor air humidity and carbon dioxide concentration; and/or the opening degree of an air return chilled water