Preservation of existing cultural heritage and the need for new facilities is a struggle that characterizes the development of a city. In Denpasar City, Bali Province there is a Subak cultural landscape in the form of an agricultural area. Subak cultural landscape has been designated as a World Cultural Heritage by UNESCO (WBD). The subak WBD site established by UNESCO consists of 4 regions spread across Bali Province. The subak area in Denpasar City by the city government is also conserved by establishing it as a green open space. Although it has been designated as green open space, land conversion continues to occur in subak land. The preservation of subak cannot only be carried out by regulations. Subak conservation must be carried out comprehensively involving all related elements. In city ecology there are three main things that influence and move dynamically, namely, politics, economy and culture. This article will review the power and its role in the existence of the cultural landscape of Subak in the city of Denpasar. This article consists of three main parts. The first part discusses the cultural landscape of subak in Denpasar City as green space and its changes. The second part discusses the cultural position of subak landscape as a component of the city. The final part is to analyze what influences power, and what its role is in the development of subak cultural landscape in Denpasar City, Bali Province.