Air conditioner fault predictive maintenance method and system, electronic equipment and storage medium

The invention provides an air conditioner fault predictive maintenance method and system, electronic equipment and a storage medium, and the method comprises the steps: establishing an air conditioner group, wherein the air conditioner group comprises a single air conditioner device or a plurality of air conditioner devices under the same working condition; obtaining a target difference value trajectory prediction model; on the basis of target monitoring data of the air conditioner group in a past preset time window, predicting the target difference value track through the target difference value track prediction model; predicting a difference value fitting track between different types of target monitoring data of the single air conditioning equipment or a difference value fitting track between the same type of target monitoring data of the multiple air conditioning equipment in a future maintenance reserved time window; and when an outlier exists in the difference value fitting track, outputting correspondi