Nowadays the term “ultraearly fire detection” and “early detection of fires” can be encountered in scientific publications, but often authors interpret their essence differently. Sometimes they make no distinction between them, depending on their solution value in comparison with known methods of early fires detection. At the same time the idea of ultraearly fire detection is still not implemented in practice. Therefore, the problem of ultraearly fire detection is considered from scientific, technical, organizational and legal points of view. Scientific aspect. The idea of ultraearly fire detection lies in the fact that it is insufficient to register characteristics of temperature and smoke fields of already developed fires. It entails delayed personnel fire fighting action. It is necessary to monitor changes in these parameters before ignition or, in extreme cases, on very early stage of fire. These changes (signals about ultraearly fire detection) are next: for example, changes of velocity and acceleration of the physical bodies surface heating temperature or volume (including room volume), concentration of specific emitting gases and other characteristic signs. Emitting during heating of many materials carbon monoxide, hydrogen, and carbon dioxide gas molecules change air composition. Registration of such changes allows generate fire alert signal long before smoke and fire appearance. It can be an early warning about unexpected elements heating in protecting object. The technical aspect. Nowadays we have temperature sensors, thermal imagers, automatic various types gas analyzers. In the article, we have considered gas fire detectors which are the most appropriate for ultraearly fire detection today. We substantiate the expediency of terminology change in relation to technical tools, realizing the idea of ultraearly fire detection as well as we detect not fire, but places (points) of possible ignition. Organizational and legal aspect. We have to make an important step on the level of guidance documents to realize the idea of ultraearly fire detection. Terms of early and ultraearly fire detection should be introduced. Only this will stop confusion in terms, allow distinguish researches in separate areas of scientific organizations involved in fire automatic developing.