The present invention refers to real estate development, capable of cash flow to variation factor defines and cope active, passive manipulation casing pipe, and is a non finished as an error, automatically cash flow of detecting the flow analysis of provided and project management system for method relates to. The present invention according to the method a real estate development, capable of cash flow analysis) with factor defines cash flow, completed or not first withdrawn and, completed or not the fire input data on cascade or chain structure, b) cash flow defines a or in vivo for preventing or treating cash completed or not based upon input data for automatically calculating revenue completed or not the cash this monthincome gold solution and completed or not cash income gold liquid accumulation, accumulation withdrawn first completed or not completed or not and accumulation automatically calculating a the fire, c) from income gold cash this month completed or not completed or not the input said this monthresinthis month completed or not from the withdrawn first completed or not and 1 1 automatically accumulation calculating a difference resin, d) said this month resin difference from the amount in the fire 1 this monththis month resin difference and to automatically calculate the PC 2, the fire and on the basis hereof urgent gold solution and completed or not resin difference is to automatically calculate the PC accumulation 2, 1 of equations below by the fire the obtained value is the fire unknown classthis month and accumulation sum greater than or an amount of money, the fire the fire unknown classthis month and accumulation amount paid to the yarn construction both the calculations to a telephone paid to the yarn construction based urgent gold non automatically update a Publication profile, and a construction, in the fire 1 this monththis month resin difference subtracted by the 2 difference resin this month of an amount of input automatically paid to the yarn construction and of an amount of minus a balance input this month resin difference accumulation automatically 2, 1 of equations below by the fire the obtained value is smaller than unknown classthis month and accumulation amount when the fire, expressions 1 obtained by the amount of money corresponds to a value of the paid to the yarn for constructing, based a telephone paid to the yarn construction and a construction and updated by the date/time automatically urgent gold non unknown classunknown class gold non to the a telephone and for automatically inputting item, 1 difference resin this month paid to the yarn construction in a construction non subtracted by the 2 difference resin this month of an amount of both input automatically this month Company for investment required by entering the automatically accumulation 2 difference resin, e) said a) to d) obtained by, completed or not this month cash income gold solution and completed or not cash income goldwith the present series mouth present condition based on accumulation liquid, withdrawn first completed or not and withdrawn first this month completed or not based on accumulation the rack of slot in step st5. withdrawn a, completed or not completed or not and urgent goldthis month the fire the fire based on accumulation urgent gold the rack of slot in step st5. payment the fire, the fire this monthunknown class gold completed or not completed or not and the fire the fire based on accumulation unknown class goldunknown class gold the rack of slot in step st5., completed or not this monthresin 2 difference resin completed or not and a 2 includes computing a server accumulation to 6 : 4.. 1 expressionsSNC-PO F (C) = SPI- In 1 said expressions, the fire this month the F (C) marine amount, the SPI 2 accumulation last month resin difference, the PO this month withdrawn first, SNC blades, presenting a funds required a minimum.