The purpose of this study was to explore the application of multimedia CAI in the life curriculum of 2th Grade elementary school. This research employed the way of action research. This research was designed to enhance students' 2D space concept and learning interesting and motivation by variable and digital teaching plan and self-made multimedia CAI. The way of this research was to teach with textbook's CD and self-made multimedia CAI. The teaching content is ”knowing our community” of 2th grade in the elementary school. This research tried to solve the difficult of observating on the spot.