The paper focuses on ‘optics’ theory which Benjamin hasconsidered for a long time. “Stereoscope” is an image of a town of images. Specially，the writer firstly depicts that these avant-garde city-films make the city itself the subject of their films. Film appears perfectly capable of re-presenting the city，of producing films that are set in cities and providing accurate portraits of lives in those cities. Benjamin establishes a paralleled past of individual childhood and social childhood. He recalls the infancy of an entire generation of the bourgeois class，cross-referenced with the epoch of socio economic formation in which it lives. And then，Benjamin discloses disastrous empirical record of modernity through the description of Technik. In order to explain the way and reason that technology endangered human，Benjamin predicts the technological potential rather than its catastrophe. He uses memory to open up the past and then inspects the reciprocation of technology critically in modern era. Memory and photography have analogies. The latter can optimize the former，especially in exploring time，which Benjamin could perceive the unrealized possibility. Finally，Berliner Chronik presents the theory of memory and speculates the experience of technological exigencies. New forms of technology exert great forces on contemporary experience. The whole individual and their perception have come，and the new generation’s “spiritual desire” has appeared in cinema. We should recognize the impoverishment of experience and the technological re-creation can offer the capacity of experience to “the eliminated person”. The reconstruction is a broadening of experience and proposition of new worlds and different natures.