The theory regarding electron temperatures within the F region of the ionosphere are reviewed. The review is split into three basic parts within the first part the speculation concerning electron heating, cooling, and strength shipping methods is reviewed, and each one the relevant expressions are up to date and the second part of the ionosphere F region contain electron temperature and its measured by incoherent scatter radars, rockets and satellites are discussed. This portion covers electron temperature variations with, local time, season, altitude, geomagnetic activity, latitude and solar cycle. The third part is primarily dedicated to a discussion of the assorted attempts to check measured and calculated ionosphere F region electron temperatures. F region electron temperatures are highly variable, depending on altitude, latitude, local time, season, solar cycle, and geomagnetic activity

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