The ibon provides many convenient services such as printing, scanning, ticket... etc. Consumers often use few functions because most of them are hard to use. Whether consumers are satisfied and feel free to use it or not, the design and usability of MMK's interface play a key factor. The purpose of this study probe the use of perplexing questions and find out the finest interface and operating procedures more suitable for consumers by experimental test. The first stage is to collect them various operational processes from the ibon's interface, make them into the typical tasks, and produce the simulated original images. With the purposive sampling, 20 persons were tested, and observed. After doing this, they are interviewed. The second stage, according to the results of the pre-test and the summary of the literature of rules, the interface and processes were redesigned. With the purposive sampling, 30 persons were tested, and observed. After doing this, they are interviewed. According to the two experimental results, the average time of completing the task is shorter than the original one. Summarize the two-stage interview record, and try to make the rules of interface design and the operating processes as the future design and plan to operational processes reference. The results are as follows: 1. The visual part (1) Descriptive text are as brief as possible, and character level should not be too small. (2) Keyword should be emphasized with the character level and colors. (3) Homepage and the process images should be made the color planning. (4) Homepage should decrease the amount of information, title and description text should be separate. (5) The button menu should be with icon to give tips. (6) The advertising object should not be too large and close to the main screen area. (7) The button with the text should show the words, back or next. The simpler, the better. 2. The operating part (1) The block of touch area should be increased to fit the range of the finger-touch. (2) Adopt the system which the users are familiar with. (3) Set the previous button and the correct button to increase the freedom of operation. (4) Decrease the steps of the operational processes.