IMS is a good candidate to be integrated in ICT and IoT-converged network by utilizing its well-developed features such as AAA, QoS and multimedia support. This paper proposes the network architecture for ICT and IoT converged applications, and particular service enablers useful to ICT and IoT application development are introduced. Based on the architecture, a testbed has been constructed for innovative service experiments. Several service scenarios which are thought feasible for field trial are also presented. It is anticipated that the proposed architecture and the service enablers can fulfill the requirements of communication apart from developing new converged ICT and IoT applications.