Problems have differentiated in cities due to metropolisation. These problems have different dimensions such as transport, communication, economic, demographic, social and environmental, changes in land use decisions, changes in the supply and demand directions and patterns of real estate. This situation has brought along many problems. Smart city is a modern concept that enables these problems to be addressed with a different approach. Smart city is a concept that aims to create sustainable cities that are more livable, healthier, more peaceful, cleaner, more compatible with nature and more sustainable than the current situation by using technological infrastructure. The ultimate aim of the smart city is to transform the city into a livable city and to maintain livability. The main enforcement authorities of the smart city concept are public institutions and organisations responsible for the execution of public services called administration. As such, it becomes imperative to examine how the basic legal infrastructure of public administrations in carrying out any activity is constructed. Therefore, establishing the legislative infrastructure of the smart city concept is a facilitating factor for the implementation of the term in daily life. In this study, the legislative infrastructure of the smart city concept in the Turkish Legal System has been tried to be analysed. In this context, the legislative dimension of the smart city concept in the context of relevant codes, decrees, regulations and circulars starting from the Constitution has been discussed; the issue of smart cities and legal legislation has been examined. In this framework, firstly, some concepts are explained to be the basis for the concept of smart city. Then, the concept of smart city is analysed in the context of practice and theory. Afterwards, general information on the way of action of the administration in the Turkish Legal System is given.