Software on-line upgrading method of intelligent instrument

The invention provides a software on-line upgrading method of an intelligent instrument. The method comprises the processes of packing, downloading, unpacking, checking, backup, storage, recovery and verification. According to the method, a mapping file packing tool is designed; a target code of instrument software to be upgraded is intelligently packed according to the classification and is processed through technologies such as compression and encryption, and an upgrading mapping file with a fault-tolerant mechanism is generated; a mapping file downloading tool is designed, and the specified mapping file is downloaded into the instrument from a main control computer through instrument remote interfaces such as an LAN (Local Area Network) interface, a GPIB (General Purpose Interface Bus) interface, a USB (Universal Serial Bus) interface and an RS232 interface; for the instrument with the USB interface as a major interface, the upgrading mapping can also be copied into a USB storage device, the device is plug