 Methods: This three-year project will be conducted in three stages, including pilot study, efficacy evaluation 12 week, and post-intervention follow-up 12 week stage. Participants will be given a smartphone if the subject does not have one, breathalyzer and training session. In the pilot study stage,10 subjects will be enrolled to validate the system. In the efficacy evaluation stage, the investigators will conduct a 12-week by enrolling 100 post-detoxification alcohol dependent patients who are randomized to 1 standard treatment ST group or 2 standard treatment plus phone-based support group technology intervention, TI group. Participants will be assessed by Time-Line Follow-Back TLFB to record the frequency and quantity of alcohol consumption, visual analogue for craving, Beck Depression Inventory BDI and Beck Anxiety Inventory BAI, Satisfaction with Life Scale SWLS, and Quality of life Scale WHOQOL-BREF and compared for outcome measures. After the 12-week trial, the investigators will take back the support system and follow the all subjects in both groups for another 12 weeks, i.e. post-intervention stage, to further understand the sustaining benefit from intervention. In addition, the investigators will identify the clinical variables or system factors that are associated with outcome measures. 