The High Energy Time-domain Astronomy(HETIDA) group was established at the end of 2015. This group mainly provides theoretical support for the construction of the Antarctic observatory (one of the major breakthroughs of PMO) and for the important fostering field of high-energy astrophysics. The HETIDA group aims to enter the inter disciplinary frontier of high-energy astrophysics and time-domain astronomy, carry out observational and theoretical researches, and obtain original and high-quality achievements. Time-domain astronomy, as the name implies, is the study of transients that would change in human observational timescale. With the promotion and operation of various time-domain survey projects, time-domain astronomy will become one of the mainstream of astronomy in the next decades. Particularly, there are still a huge amount of space for the discovery of transients, especially those with time-scale shorter than one day. Most of transients are high-energy phenomena. In summary, The HETIDA group is to study the cosmic high-energy variables and transients, such as gamma-ray bursts, supernovae, fast radio bursts, gravitational-wave events and so on, which are hot topics in astrophysics. All these sources originate from the stellar explosions in the universe and are closely related to compact stars (neutron stars, black holes, etc.). We will investigate the physical processes of these objects, and will use them as “standard candles” or cosmic probes to constrain various cosmological models, explore new physics, and test the fundamental principles of physics.