A multiprocessor system including at least a first processor and a second processor, includes a storage unit that stores a first program executed by the first processor and a second program executed by the second processor, a memory unit that has a memory region used by the second processor, and a monitoring unit that is connected to the storage unit and the memory unit via a communication line, and, in a case where a program read from the storage unit is the second program, stores the read second program into the memory unit.