Shadow advertisement system and method, controlled in linkage with smartphone

Disclosed are a shadow advertisement system and a shadow advertisement method which are controlled in linkage with a smartphone. The system comprises: a power supply unit for, in DC-DC conversion of solar energy from a photovoltaic module, supplying a constant DC voltage and DC current or using an SMPS power source; a shadow advertisement controller for receiving, via a smartphone and a wireless communication means, an upload of an advertisement image and setting an advertisement time; and a shadow advertisement system for projecting a shadow advertisement printed on a film through a light source, a lens and an advertisement film in linkage with a lighting circuit and exposing the shadow advertisement, wherein the shadow advertisement is exposed at a certain location in such a manner that the light source is delivered to and penetrates the lens, and the advertisement printed on the advertisement film is projected by light which has passed through the lens.