This paper presents a conceptual model of smart tourism and how it can be measured. Smart tourism is an emerging field of studies as a consequences of rapid adoption of information and communication technologies which affect to people mobility around the world. Although there is a growing interest of researches in smart tourism, however there is lack of theoretical model which defines smart tourism of developing countries context. Drawing from a qualitative study approach, we discuss the model of smart tourism which covers various dimensions of smartness and tourism aspects. In this model, we emphasize the sustainability of destinations which require active participations of the local people around the destinations, the government as policy makers, business community and the tourists. Then, we describe smart tourism into 4 dimensions including smart experiences, smart business ecosystems, smart community and smart destinations.