Security industry is a particular industry which is acquired for the present demands of social environment and integrates techniques and manpower. In technical aspect, digital technology has become the core element in the rapid development of electronic security. In the manpower aspect, because of the effect of the whole objective environment, the quality of fundamental human resources in security industry can not be improved in a short time. Only through the self-requirement in this industry, supervision of government authorities and the limitation of private security laws, some improper phenomena in the straitened circumstances of human resource in this industry could be corrected. Security staffs are the active factor of security industrial management, therefore, the quality of security staffs is deeply related to the business constitution and social image. To effectively improve the security industry’s service standard, effectively control security staffs’ behavior, and then avoid illegal events, strict limitations to standards of employment qualification of security staffs should be legislatively designed. This is also one of the main focuses on setting up private security laws in every country. This study examines the regulation to security staffs in the present private security law in Taiwan, and then compares with those in Japan, Korea, Germany and France, and with the draft plan in Mainland China. By analyzing the elements of related laws for security staffs in every country, such as employment age threshold, limits to crime records, certificates and trainings, duties and obligations, compensations for tort and causing damages, etc., it is hoped that a legislation frame suitable for our national conditions can be planned. Finally, through the conclusion of laws comparison, this study hopes to provide useful suggestions for the progressing revision of private security law.