Abstract: In order to measure and image cloud droplets ranging from 25m to 1550m, an airborne cloud particle imaging probe was designed based on the established optical imaging techniques. The images of particles passing through a collimated laser beam were projected onto a linear array of 64-element photo detectors and were reconstructed from the individual image slices. The function of each component and the quantitative standard of each detection unit were introduced. The method of data acquisition and the factors affecting the accuracy of cloud particle imaging were discussed. A calibration setup of particle size was constructed where seven kinds of standard dots were used to calibrate cloud imaging probe. The calibration experiment results show that cloud imaging probe can accurately achieve particle size distribution and display 2-D images. The airborne experiment data shows that cloud imaging probe is able to detect cloud droplets and acquire their images.