To achieve the goal, on the basis of the theories of urban morphology and image, the paper develops the concept of urban imaginable morphology, generalizes the elements and its composite structure, and points out that it s the starting point of the conception of urban.

High-rise building and city image shaping;

On Chinese traditional buildings and city image building;

Urban community safety is precondition of urban image.

Building of "Great Dalian" and city identity strategy;

As a social systemic project,the major aim of city identity is to develop city s appearance and promote city s competitions.

These communication culture characteristics require the port city to reflect its water charcter, composite communication features, digital port profile and green city identity in establishing the port city identity.

Especially in high-dense urban area, practice that build to get the city-image and catch the need of function, so as to put forward the direction of central urban space design.

Based on the development of city-image molding process,the paper expounds the transitional idea of molding city-image fromdesigning to marketing influenced by both competition among cities and the change of industrial structures.

With the development of economy at full speed, city-image as the external manifestation of city capability reflects the integral level of city nature, economy and social development in recent years.