The invention discloses a city signal intersection safety guiding system and method based on a holographic projection technology. The increasingly mature holographic projection technology is applied to the traffic field, and the conversion of intersection signal two-dimensional control to three-dimensional control. The holographic projection technology and the traffic signal control are creatively combined, and thus the function for performing projection caution on vehicles to get into ''a dilemma zone'' is realized. A new thinking and a new solution method are provided to solve the problem that safety accidents frequently happen at the intersection. And the city signal intersection safety guiding system and method based on the holographic projection technology reduce the safety accidents at the signal intersection to a certain degree, guarantees the life safety of drivers and pedestrians, thereby building a ''harmonious traffic'' safety atmosphere.