The present invention provides a computer and a method to realize the coupling between computers. The computer includes: a first interface used to connect with a second computer; a data interactive module, connected with the second computer through the first interface, which is used to enable the second computer to access the data interactive module when the first interface is connected with the second computer, in which the access includes fetching data from the data interactive module and storing data in the data interactive module; a processing module connected with the data interactive module, which is used to communicate data to the second computer through the data interactive module when the first interface is connected with the second computer. It can conveniently utilize two computers to form a hybrid computer system using this technical solution.