Research conclusions: Control and management of construction project cost is a process management from the investment decision—making to the final settlement of account for final completion of construction project and is also a systematic project with no dispensable part．Only all costs of the whole construction works ale controlled Call the goals Can be achieved．A systematic and integrated method should be used for controlling the whole construction process to eliminate the”Three Excesses”phenomenon，control the construction project cost reasonablly and effectively and save the construction cost to gain the maximum economic and social benefits．