Two　elements　(cells)　can　be　integrated　together;　there　must　exist　the　action　of　the　force,　including　internal　force　and　external　force.　The　Law　of　Universal　Gravitation　and　the　Coulomb＇s　Law　reveal　the　law　of　integrated　internal　force　distribution　of　the　non-＂super　distance　(an　integrated　element　directly　acts　on　another　one)＂　elements　in　the　integration　of　the　natural　system.　The　social　system　is　composed　of　persons.　Individuals,　groups　and　organizations　are　the　basic　elements　(cells)　of　the　social　system.　The　integration　between　them　belongs　to　the　integration　under　the　non-＂super-distance＂　condition.　And　there　exists　the　action　of　integrated　internal　force　also.　The　quality　and　psychological　distance　of　integrated　elements　and　related　environment　affect　the　forming　of　the　integrated　internal　force　between　them　and　big　or　small　of　it.　All　of　them　are　functions　of　the　time.　At　certain　time　and　under　certain　environment　conditions,　the　integrated　internal　force　is　in　direct　proportion　to　the　quality　of　the　integrated　elements,　and　is　in　inverse　proportion　to　square　of　the　psychological　distance　between　them.　The　simpler　the　environment　is,　the　more　easily　the　integrated　internal　force　forms.　The　more　complicated　the　environment　is,　the　higher　the　quality　and　the　shorter　the　psychological　distance　are　required　if　one　wants　to　maintain　the　integrated　internal　force　for　the　constant.　There　is　important　significance　in　the　theory　and　practice　of　the　integration　management　to　reveal　the　law　of　integrated　internal　force　in　the　social　system.