The invention discloses an AI technology based intelligent vehicle-mounted air conditioner control method and system. The method includes the following steps: a human face feature extraction module obtains user face features and sends the user face features to a vehicle cloud module; the vehicle cloud module compares the user face features with pre-stored user face features after receiving the user face features and feeds back a corresponding command to a control module, wherein the command includes an intelligent control mode and a voice control mode; and temperature in a vehicle is controlled according to temperature acquired by an external temperature module and the command received by the control module. Intelligent vehicle-mounted AI equipment in the invention can learn behavior of auser and intelligently predict and adjust temperature of an air conditioner by combining with external conditions when a user rides, which eliminates a tedious process of voice input command and is more humanized.