Virtual machine and bare computer instance mutual migration method and system

The invention discloses a method and a system for mutual migration of a virtual machine and a bare computer instance, and belongs to the technical field of cross-computing instance type migration in a cloud computing platform. The problems that an existing migration method is complex in operation, businesses on an original instance cannot continue to run, and a bare computer node needs to install an agent in guest os to trigger an instance migration action are solved. According to the method, different types of nodes can be provided by switching the types of the virtual machine nodes and the bare computer nodes on the basis of not reinstalling the nodes, so that the instance can be migrated between the types of the virtual machine nodes and the bare computer nodes. Moreover, after migration, the instance still uses the original UUID, network and storage data, and the service on the original instance can continue to operate, so that the migration action does not affect the continuous operation of the existing