Since cleaner business initiative of most enterprises are not enough，this paper analyzed specifically the uncertainties’trigger origins，uncertainties’systematic transimission paths and different operation sectors’risk trigger level of clean operation based on the investigation towards electronic enterprises in Nanjing areas．Firstly，this paper gave a static assessment of the risk trigger levels of different business module and sectors，then did a dynamic analysis the systematic uncertainties resulted from different risk trigger origins according to two paths of“risk feeble transimission”and“risk powerful conduction”by adopting system dynamics simulation( SD) ． Sequentially，the static and dynamic research results were compared to explain the most enterprises’motivation of avoiding the uncertainties of clean business，and some useful incentive policies of promoting enterprises to carry out clean operation were put forward according to our research．