The work aims to improve the detection efficiency of bubble-cap medicine, reduce the production costs and improve the quality of pharmaceutical packaging. An online visual detection system of bubble-cap medicine was designed based on DSP and the touch screen. The image processing and core control of bubble-cap medicine were completed by using the TMS320 DM365 chip. The online monitoring and the display of image processing results of the control system were achieved by the touch screen and LCD. Moreover, the software design of control system was completed based on the hardware structure. From the experiment and test on such system, its accurate detection rate could reach up to 100%. The control system can rapidly detect the packaging defects of the bubble-cap medicine with a quite high detection accuracy, which greatly reduces the labor intensity and effectively lowers the production costs.