Abstract: The present disclosure relates to the field of computers, provides a data processing method, a device, and an ESB system such that information is transferred in an ESB system more flexibly. The method includes receiving service information, sent by a console, of a to-be-deployed first service, where the service information includes a definition of the first service and a service identifier of the first service, generating a first service instance according to the definition of the first service, where the first service instance is a service instance, deployed on a first deployment node, in service instances of the first service, and sending first address information to service instances in an enterprise service bus ESB system except the first service instance using the first service instance such that a second deployment node invokes the first service instance according to the first address information using a second service instance.