The purpose of this study was to provide basic data on technology education activities by exploring how technology systems composed of input, process, output, and feedback actually work in house building activities. The method of this study was conducted by literature review and participant observation through case study. In the literature study, the construction of the technology system and the building process were intensively explored. In the case study, the technology system was analyzed by directly participating in the process of performing house building activities. The building activities were carried out from March to October, 2016 for 8 months. The researchers studied the operation of the traditional technology system by operating the house construction process and the conclusion is as follows. First, the flow of the traditional technology system must be modified in construction technology. In other words, the feedback in the system must be interacted as shown in the following figure. Traditionally, the feedback process is based on the results of the output, and is defined as feedback to the input and process stages when the problem occurs. Second, feedback in the technology system must be provided immediately and in correlation with each other. Because of the nature of the construction technology, if the feedback is done after the output, it takes considerable time and expense to go back and modify it. Finally, the interaction feedback in the technology system may be applied to other areas of technology.