Advertising photography using indirect expression method does not directly highlight the form and texture of the commodity itself, but focuses on topics unrelated to the commodity, only promotes the commodity in an inconspicuous position, and attracts people's attention through the charm of topics unrelated to the commodity. The application of contrast in advertising photography can often make the subject more vivid and intense, and the contrast in advertising photography can start with multiple modeling factors on the screen. For example, the contrast between light and shade, thickness, movement, big and small, more and less, softness and rigidity, sparseness and density, cold and warmth, and the change of light and shadow emphasizes visual effects. Reasonable exaggeration means that in advertising photography creation, with the help of imagination, based on real life, grasping some characteristics of commodity image and using reasonable exaggeration techniques, the picture is novel and innovative, and finally highlights the essence and characteristics of the object.