Introduction: The Enterprise  Resource  Planning system is  an  emerging  technology  that belongs to the scientific discipline of information systems. In simple words the ERP system integrates an organization’s resources and also involves business processes and organiza-tional changes. With the ubiquitous growth of IS investment, ERP systems implementation grows strongly. More and more companies introduced ERP systems. However many ERP implementation success stays at technical perspective. Users’ acceptance of ERP system is the key to the ERP implementation.

Purpose: The purpose of this study is to investigate and research factors that have affected the  end-users’ acceptance of the ERP  system  during  post-implementation  phase  of  the ERP implantation lifecycle.

Method: In  order  to  understand the ERP  system  acceptance  in practices,  this  study  will collect data from two Chinese companies. Employees from two Chinese companies will be selected as  target  group  for  user  acceptance research.  With the  analysis  of  collected  data, user acceptance of the ERP system in those two Chinese companies will be studied. Inter-views and questionnaire are used in this study. This study will interview with ERP export and  generate  the  factors that could  have possible affected users’ acceptance. Hypotheses will  be  deduced by  those  factors. Based  on  the  primary  data  of questionnaires regression analysis is used to test those hypotheses to identify those factors.

 Results: Research results show the factors that influence end-user acceptance of the ERP system. The factors are: Business process adoption, ERP system performance, ERP com-munication, ERP  functionality, Computer nervousness, Technological  innovation, Social impact and support, ERP support. Organizations need to pay attention to those important factors in order to improve the ERP system acceptance among end-users.