This paper describes a survey of site safety organization in construction sites. It explains the principle of a successful safety organization and system for Construction Company based in Cheng Du, Si Chuan. Most employees of the company and some of the subcontractors took part in the survey more than 10 construction projects. Total, 365 valid records were obtained from the construction sites. The results of the survey provide reference to project managers and construction safety officers. Last, analysis and summary are given in this paper.