Abstract This project surveys, using CATI(Computer Assisted Telephone Interview) System, those who called the number 0800-066666(Environment Protection Appealing Line) to appeal for environmental protection during the period:October 1, 2001 through August 31, 2002。A questionnaire containing the following topics: appealing frequency, types of appealing, service satisfication of the call center personnel, the attitude, speed, speciality and service satisfication of the investigation personnal, ways of replying the investigation results, the protection of personal information and other suggestions/recommendations to Institute of Environment Protection. Among the 23,356 persons contacted during the interview period, 5,001 persons complete the questionnaire. All the data collected from the CATI system are then coded, error-checked and cleaned. After this cleaning process, we use SPSS statistical package to do statistical analysis.