Recently, virtual reality (VR) technologies have developed remarkably. However, some users have negative symptoms during VR experiences or post-experiences. Consequently, alleviating VR sickness is a major challenge, but an effective reduction method has not yet been discovered. The purpose of this article is to compare and evaluate VR sickness in two virtual environments (VE). Current known methods of reducing VR sickness were implemented. To measure VR sickness a validated simulator sickness questionnaire (SSQ) was undertaken by the subjects (n = 21). In addition, subjects wore a customized biological sensor in order to evaluate their physiological data by measuring responses in three kinds of natural states and two kinds of VR experience states. This quantitative data, as objective evaluations according to the biological responses, is analyzed and considered alongside subjective qualitative evaluations according to the SSQ. The outcomes and limitations of the reduction methods and data collection are discussed.