The purpose of this study was to understand the categories and patterns of interpersonal behaviors of counselor and client, and the counselor intentions and the client’s covert reaction behind interpersonal behaviors. By analyzing the interaction process, the interaction characteristics of important events were presented. The interpersonal behaviors of counselors and clients in the important events of the first and the third sessions were analyzed by using revised “Interpersonal Communication Rating Scale”, the data collected by using Interpersonal Process Recall (IPR) were analyzed based on “Intention List” and “Client Reaction System”. The counseling process of four pairs of counselors and clients, and 26 important events were analyzed. The results indicates: (1) In important events of counseling, the most frequent interpersonal behaviors using by counselors were “Leading” and “Nurturant”, the most frequent interpersonal behaviors using by clients were “Docile” and “Cooperative”, and the most frequent interaction pattern was “Complememtarity”. (2) The most frequently occurring counselors’ intention was “Support”, most often performed by using “Nurturant” behavior. For the client, the most frequent client’s positive covert reactions were being performed by using “Docile” “Cooperative”. When occurring negative covert reactions, the interpersonal behaviors of hostile dimension of clients increased. (3) In initial stage of counseling, the counselor used “Leading” and “Nurturant” behaviors, and established counseling relationship with client. When the counselors wanted to influence client further, their used “Self-enhancing” and “Critical” behaviors, and change the interaction style. Counselors considered the situation and concerned about the clients’ thoughts and feeling, made the clients performed “Docile” and “Cooperative” behaviors, and complemented the counselors. Suggestions for counseling practician and further study were recommended.