The Geographical distribution of Guangdong Service Outsourcing Industry is mainly concentrated in the Pearl River Delta，especially in Guangzhou and Shenzhen. The influencing factors are mainly industrial base，city comprehensive competitiveness，government’s supporting measures，human resources，infrastructure construction，business environment and etc. In other cities of the Pearl River Delta，service outsourcing industry also get certain development. If government’s supporting measures，potentials，and superiorities are increased，tapped and exerted，there will be a good momentum of development in service outsourcing industry of these cities.