In order to collect biological data of human in real-time, we developed biological data collection system (BDCS) using a cellular phone. The BDCS consists of EMA system and biological measuring devices (BMD) system. In this study, the EMA system was implemented to obtain subject behaviors and feelings related sleep around two weeks and BMD to obtain biological data such as snoring, skin impedance, pulse wave, and event during sleep over a night. Some factors as consequence of uncomfortable sleeping that related with breathing, sleep stressed, blood pulse wave, and awakening can be seen on the web. The BDCS could be useful for physicians to obtain adequate information that related with uncomfortable sleep in the real time.