This study focuses on teaching technological color schemes in science fiction art creation for junior high school students. It first explains the core characteristics of sci-fi art and theoretical foundations such as color psychology and contrast harmony, clarifying the logic behind applying technological colors. The paper then details three expressive techniques: cool color combinations, color gradients, and special color materials, while providing solutions to common color-related issues encountered by students. Subsequently, teaching strategies are constructed from three aspects: textbook integration, instructional method design, and diversified evaluation. Through the "Future Tech City" teaching practice case, the study analyzes outcome data. Practical results demonstrate significant improvement in students' ability to apply technological colors, validating the feasibility of the teaching strategies and providing systematic references for junior high school art sci-fi painting instruction.