In this study, task analysis was applied to the four-step model of family therapy to understand how family therapists intervened and the behavioral characteristics clients showed during the consulting process. Five families volunteered as research participants. Researcher of this study was also the family therapist who provided between five to nine therapy sessions to the respective families. Task analysis was applied to delineate the four-step conceptual tasks, followed by collecting transcripts based on actual therapeutic behaviors in counseling sessions. Content analysis was used to compare the conceptual tasks and actual therapeutic behaviors. Results revealed 13 therapist tasks related to the four-step model, 43 task characteristics that indicated effective change, and interactive relationships related to therapeutic tasks. This study concludes that: 1. Exploratory language in the therapeutic process is helpful to implement the four-step conceptual model; 2. Interventionist skills in step 2 and step 3 can promote more in-depth exploration of family messages; 3. Client changes in step 4 challenged therapist’s myth of what constituted a perfect family. Based on the results, researcher reflected on what the ultimate behaviors of family therapy is and how client problems affect the therapeutic process. Suggestions for family therapeutic tasks, training, and future research were offered.