The Internet of Things (IoT) is a very hot topic and has attracted much attention recently. Its concept is to connect anything at anytime and anywhere with an Internet-like structure. IoT technologies, such as IoT big data analysis and IoT Clolud, are shaping our daily lives; many IoT applications are booming, including intelligent transportation, logistics, production, healthcare, and smart X’s (X stands for home, campus, city, factory, etc). There are many IoT-enabling technologies, such as RFID-capable, Bluetooth-capable, Zigbee-capable devices, and wearable devices from the device domain aspects, as well as the Long Term Evolution-Advance (LTE/LTE-A) networks, Wireless Local Area Networks (WLANs), Wireless Sensor Networks (WSNs), Vehicular Ad-hoc Networks (VANETs), and Machine-to-Machine (M2M) communication, from the network domain aspect. With the enabling technologies, various IoT applications can then be developed handily. Similar to IoTT 2013 and IoTT 2014, which are held in Soul, Korea, and Hsinchu,Taiwan, respectively, IoTT 2015 is to solicit original new ideas on general IoT issues as well as on the design, development and deployment issues of both device-domain and network-domain IoT technologies. The workshop aims to facilitate discussions and idea exchanges by both academics and practitioners. Authors are invited to submit an electronic version of original, unpublished manuscripts, not to exceed 6 double-columned, single-spaced pages, to the workshop. Submitted papers should be in accordance with IEEE Computer Society guidelines, and will be refereed by reviewers in terms of relevance, originality, contribution, correctness, and presentation. All Accepted papers will be published by IEEE Press (indexed by EI) and will be included in IEEE Xplore.