A system in which a plurality of network nodes are connected through a network, wherein when a computation object of a first network node calls a function (facility) of a computation object of a second network node, the first network node obtains a facility identification codes (numeral) of the object and the function from a remote reference table and outputs the facility identification codes through the network as a message together with the arguments of the function to the second network node. The second network node uses the input facility identification code as a key to obtain the execution address of the facility from a local reference table and executes that facility.