The invention discloses an electromobile energy supply cost analysis method based on a hierarchy analysis method, which comprises the following steps of: 1) constructing a hierarchical structure model by taking electromobile energy supply cost as a target layer, an evaluation index as a criterion layer, sub indexes of the evaluation index in the criterion layer as a sub criterion layer and an optional battery energy supply mode as a scheme layer, 2) quantitatively evaluating importance of the sub indexes under the criterion layer for a general target of the target layer according to a 1-9 scaling method and constructing a comparison judgment matrix, 3) calculating a weight vector of the matrix, 4) carrying out consistence check on the judgment matrix, modifying importance weights of the criterion layer and the sub criterion layer for the general target if the consistence check does not meet requirements till the consistence check meets the requirements, 5) outputting a synthetic weight of schemes of the scheme layer, and 6) carrying out decision analysis. The analysis method has reference and application values for the decision analysis of constructing a charging station and an electrical changing station.