Abstract. The Next Generation Network (NGN) has a multilayer logical construction. Network carriers use various tools in complex procedures to operate application servers on the NGN. We try to establish a method for operating application servers in a unified management environment. This method operates between the network layer, which manages applications. First, we select requirements to achieve a unified management environment for application server operation. Then, we select a test function and a monitoring function from operation functions, in an experiment to confirm the achievability of our method. We test the achievability of two application server functions, which supply web services in the experiments. Our method supplies these functions without programming and manual procedures.