This is the first Conference dedicated on this emerging field organised by the United Engineering Foundation. The Conference brings together a good mix of participants from industry and academic organisations from 14 countries. The Conference program includes the following: 9 Keynote lectures and 67 papers. The Conference objective is to address the state- of-the-art knowledge in the field of heat transfer in extreme conditions involving very small scale, both at space level and at time level. The Conference intends to provide a forum for scientists from academia and people from industry to present and discuss recent advances in their research on thermal phenomena in micro scale.