The invention relates to a multi-user different-place concurrent collaborative system which supports a PSASP algorithm and a BPA algorithm. The multi-user different-place concurrent collaborative system comprises a province calling user, a local calling user, a system maintenance server, a communicating device, a Web server, an application server, a database server, a scheduling server and a disk array, wherein the province calling user, the local calling user and the system maintenance server are all connected with the communicating device through a wide area network, a central exchanger of the communicating device is connected with a cable through the Web server, the disk array is connected with the database server through an optical exchanger, and the application server, the database server and the scheduling server are all connected on the cable. The system establishes the unified equipment parameter data standard and a unified power grid simulating calculation model, firstly integrates the two mainstream calculating algorithms of the PSASP algorithm and the PSD_BPA calculating algorithm, provides a unified calculating interface and operation view show for calculating staff and overcomes the defects that daily traditional mainstream algorithms are separated to cause manual data conversion, repeated work and the like.