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tion. The Fourth Industrial Revolution can be summarized as the increase in productivity due to artificial intelligence (AI) and hyper-connectivity [1]. Diverse new technologies are being proposed that integrate the physical, biological, and digital worlds, and new technology will be embedded, even in the human body. For example, a technology like the smart watch combines human body information with the digital world. Many people have hopeful expectations for the future of the Fourth Industrial Revolution. Among other things, medical and life sciences are being discussed as key areas of this revolution, unlike previous Industrial Revolutions. AI, such as IBM’s Watson, is expected to be able to make a more accurate diagnoses than current specialists in some areas [2]. Wearable Internet technology will monitor our health in everyday life. By 2022, 10% of the world's population is expected to wear apparel connected to the Internet [3]. Even now, smart watches are on the market. Furthermore, due to the development of implantable technologies, the first implantable mobile phone is expected to be commercialized in 2023 [3]. Ultimately, devices with communication and motion/health monitoring functions are expected to be implanted in the body. These changes are expected to help people manage their health more closely. Under such circumstances, it is necessary to examine whether our medical society is ready for the Fourth Industrial Revolution. The core of this revolution is the creation of new knowledge and values based on connections to various types of information. Because most health data are concentrated in hospitals, how well the current medical society stores information will be key for progression to the Fourth Industrial Revolution. Are hospitals prepared for this kind of environment? The author recently reported on the current state of information technology in all general and tertiary teaching hospitals in Korea in 2015 [4]. All hospitals were surveyed to estimate the level of adoption of Electronic Health Record (EHR) systems according to 24 core functions on documentation, results, order entry, and decision support. An interesting point is that the EHR adoption rate was higher in Korean hospitals (37.2%) than in US hospitals (15.1%) in 2010, but the opposite result was observed in 2015 (58.1% vs. 75.2%). The level of financial and political support provided to US hospitals by the HITECH Act may have influenced this result. Although this survey was only conducted in Korea, the situations of most countries that do not fully support hospital informatization might be similar. In addition to basic medical records, diverse types of valuable data are being generated in hospitals, but they are not collected properly. A representative example is that of biosignals (electrocardiogram [ECG], electroencephalogram [EEG], respiratory data, SpO2, etc.). Previous studies have suggested that these data are useful for predicting major clinical events [5,6]. They could also constitute core data for developing prediction algorithms for wearable devices. However, most hospitals do not store these types of data, or they store them in a form abbreviated every few minutes rather What We Need to Prepare for the Fourth Industrial Revolution