The majority of the traditional group evaluation methods takes no account of the involvement of evaluated objects, therefore a new group evaluation method, the subjectobject interaction group evaluation method is proposed to fill in this gap. Firstly, the process of the subjectobject interaction group evaluation method is described; secondly, singleround evaluation results based on the priority and probability are presented accordingly; thirdly, the indicators of Stability and Satisfaction for evaluation are put forward, and conditions under which the interaction between subject and object come to an end are discussed; finally, two crossweighted operators are defined in order to aggregate the results of interactions between subject and object in each round and reach the final evaluation results.