This Paper raises its main question in determining an effective paradigm shift in conservation and development of Historic Urban landscape with the aim of recognizing the evolution process of conservation and development approaches in order to define the paradigm, moving from an integrated approach towards the ideal approach. For this purpose, first the Historic Urban Landscape concept, as a new approach in conservation of urban heritage, is analyzed. After that, the role of change management concept in integrated approach of conservation and development is determined and reveals the necessity for a paradigm shift in order to fix its shortcomings. Based on this, the evolution process of conservation and development approaches is classified into two main steps, the separate approach and the integrated approach. Then, the Ideal Approach is introduced as a comprehensive approach that provides the possibility of balancing conservation and development approaches using the concept of change management and through the self-refining cultural filter of indigenous people. The proposed paradigm shift of this paper, by benefiting from the components of flexibility, dynamism and process-orienting, is formed in defining the self-refining cultural filter and paves the way for moving towards the Ideal Approach by which the conservation and development approaches would be like a single action with maximum compliance and compatibility.