Abstract
We did research on measurement required for the systems development which measures personal environmental gas and body information simultaneously. This research is an example which applies wearable information machines and equipment to a user's health care. We verified the carried type constant potential electrolysis formula sensor which continuously measure formaldehyde that is one of the sources of indoor environmental pollution. And we newly made the blood-flow sensor as an experiment as a body information sensor. Based on the above, we examined the design indicator towards development of wearable sensing unit.