A quick recovery method, device and system, where the method comprises: forming a first and a second host machine into a storage peer pair, such that read and write requests of a virtual machine of the first host machine are backed up in the second host machine; starting, by a backup host machine, the virtual machine of the first host machine when it goes off; receiving, from the backup host machine, read and write requests transmitted by a calling party, and judging whether full data synchronization from the second host machine to the backup host machine is finished; if it is not finished, transmitting read and write requests to the second host machine; storing data to be written in the second host machine based on the write request, or acquiring data based on the read request and transmitting the data to the backup host machine; transmitting, by the backup host machine, the data to the calling party.