Method and bus system used for processing data of multiple bus devices

The invention relates to a method and a bus system used for processing data of multiple bus devices. When receiving communication commands used for accessing devices on buses and sent by an upper computer, a main control module stores access commands in bus command cache regions of the buses corresponding to the devices needed to be accessed; and an MCU chip sends the access commands to the devices needed to be accessed on the buses in sequence in a roll polling manner according to a sequence of the access commands, marks states of the commands as running states, and then quits operations on the devices on the buses. According to the method and the bus system, the MCU chip processes return data of the devices on the buses in the roll polling manner; the main control module is connected with the multiple buses; each bus is connected with the multiple devices; the MCU chip can access all the devices of all the buses; switching does not need to be performed; wiring is simple; few resources are occupied; the data