The rapid advancement of Artificial Intelligence Generated Content (AIGC) technology is permeating every aspect of film and television production with unprecedented depth and breadth. This paper systematically explores the relationship between AIGC and cinematic creation by synthesizing recent academic literature and industry practices. It first outlines AIGC's current applications and integration across the entire production lifecycle—from conceptual design in pre-production to post-production editing and special effects. The analysis then delves into its paradigm-shifting impacts, including narrative evolution, aesthetic innovation, and reduced production costs. The study also critically examines challenges such as copyright conflicts, ethical dilemmas, creative authenticity issues, and structural employment shifts in the industry. Concluding with forward-looking projections, it suggests that human-machine collaborative "director-centered systems" will become the new normal in the film and television industry. Rather than replacing human creators, AIGC serves as a powerful "new brush" reshaping the language and industrial ecosystem of cinematic art.