System has expectant function in moral aspect,which is mainly displayed in system helping shape moral cognitive model.To realize this function,people need to realize cost-benefit.In the case of lost and found company asking for compensation,through the analysis of happiness value,the owner of the property and the sanitation worker make the decision to return the property and ask for compensation is moral;"the related system" put forward by the netizens is conformed to the expectant function of morals.