A network system built in a distributed system environment includes a server having a first ORB, a client having a second ORB, specifications for which are different from those for the first ORB, and a naming server which registers a profile object to disclose specifications for the first ORB through a naming service of the naming server. The second ORB in the client accesses the profile object through the naming server, grasps the specifications for the first ORB, and performs IIOP intercommunications according to the grasped specifications. The network system improves reliability and communication efficiency in intercommunication between ORBs with different specifications.