During the life-cycle of the large projects,the operational phase which lasted the longest and cost the most,is the major link project benefits reflected. In the whole phase, energy, human resources and the equipment maintenance may cost a lot. Effective control of such cost is one of the main targets of engineering management informatization(EMI). In the phase of project operation, project management institution,customers and partners are the stakeholder of EMI. Through the case of the airport management informatization, inherited and innovation of EMI has been discussed.