The invention discloses a digital urban rail transit vehicle base construction method and system. According to the method and the system, a design scheme normative database is established, various uploaded urban rail transit vehicle design schemes are quantified, and according to a quantification result, an urban rail transit vehicle design scheme is determined and optimized; a vehicle process equipment database is established, and type, power and number data of vehicle process equipment is determined; a vehicle base digital three-dimensional model is established, the simulation vehicle base digital three-dimensional model simulates the construction process of the the optimized urban rail transit vehicle design scheme, and according to an evaluation result, an optimal construction plan ofan urban rail transit vehicle base is established; and an organizational structure, resource configuration, a progress plan and external coordination of the optimal construction plan of the urban railtransit vehicle base are subjected to digital management, so that full-digital management construction of the urban rail transit vehicle base is implemented.