1. A method comprising: determining a reliability value of a designated evaluation of an interacting party based on a feature value of a service interaction in response to receiving the designated evaluation of the interacting party in the service interaction; determining a reliability mean value of multiple designated evaluations based on reliability values of the multiple designated evaluations of the interacting party in multiple service interactions including the designated evaluation; determining a reliability weighted mean value of the multiple designated evaluations based on a frequency weight corresponding to the multiple designated evaluations and the reliability mean value, wherein a number of the multiple designated evaluations is in a monotonically incremental or decremental relationship with the frequency weight; determining a user feature of the interacting party based on a size relationship between the reliability weighted mean value and a preset reliability threshold.