This paper describes the research results and the experience gained by applying pen-computers to the area of construction quality. A pen-based computer system has been developed to include the functions of signature, error detection, drawing capability, form navigation, user instruction, and decision making. The system eliminates the required effort to convert the inspection data from paper forms to computers input. Moreover, it contains statistical algorithms to automatically facilities either accepting or rejecting the quality of a finished construction product. A pen-based computer provides many benefits. This paper will begin with a brief review of the pen-based computer technology followed by detailed design of the pen-based computer system for quality inspection of steel bridge painting. Finally, conclusion and recommendations will be provided.