Real room fires may not all lead to flashover. This paper takes room set fire scenarios of soft package KTV and city apartment in Shandong Province's fire investigation job practical competition in 2021, which were in accordance with the real reproduction, as the object, collected and analyzed the temperature field and video data during the burning process. The study found that: the room fire had a window of escape time only about 90 s; The restrained concrete beams of the room showed an upward arching pattern after the fire; Non flashover room showed travelling fire state, temperature development went up and down, and heavy smoke was produced; Temperature field data can be used as a supplement to video evidence to assist in fire location and fire travelling path identification.

actual fire scenarios, fire cause investigations, space temperature field, travelling fire