The invention provides a recovery method and system against startup disability caused by a BMC fault. According to the method, through direct connection of a client and a server, a console is debuggedto enter a uboot environment through a BMC; an IP address is set to be in the same network segment as the client in uboot; and then the BMC of the server is updated through TFTP software, so that startup, disabled by BMC start failure or BMC crash, of the server is recovered. Through the recovery method and system, operation steps are easy and convenient, execution efficiency is high, it is not needed to purchase a programmer, cost is reduced, damage to a mainboard by a BMC chip welded to the mainboard is reduced, and normal operation of the server is maintained.