Palaeoenvironmental and palaeoecological fluctuations of significant geological periods are one of the key scientific issues to geologists. The Triassic/Jurassic boundary (TJB) witnesses the mass extinction event about 200 Myr ago followed by a rapid biotic recovery in the Early Jurassic. The TJB event triggered environmental changes, such as increased palaeo-CO_2 and accompanying extreme global warming, floral and faunal turnovers as well as more frequent wildfire activities. Recent investigations from Europe have demonstrated an active wildfire event and palaeoenvironmental, palaeoclimate, palaeoecological fluctuations across the TJB by using integrative approaches, such as coal petrology,geochemistry, plant morphology and palynology. In this paper, we summarize the major approaches, progresses and perspectives for TJB fire event studies. Charcoal, microscopically recognized as an inertinite maceral, is the direct evidence of wildfire activities. The evidence of coal petrology across the TJB in Sweden and Denmark show a significant increase in inertinite across the boundary reaching a maximum in the Hettangian. This reflected a broad change in fire regime from crown fires (high temperature) to surface fires (low temperature) and to basically no wildfire activity. The morphological study of the fossil plants leaves showed that the flora changed from broad leaves vegetation to narrow leaves vegetation. On the other hand, analysis of the flammability of modern analogue leaves found that narrow leaves are more flammable. At the same time, palynological evidence also suggests that a large number of canopy plants had disappeared at the late-Triassic, and ground cover plants declined sharply at the early-Jurassic. Carbon isotope studies of fossil plant cuticles have revealed a marked global negative carbon isotope shift across the TJB, which also provides independent support for a wildfire event.