The Milun fault Drilling and All-inclusive Sensing (MiDAS) project, launched in late 2021, drilled two holes in the hanging wall (Hole A) and footwall (Hole B) of the Milun fault, Taiwan, and reached the fault zone at a depth of approximately 500 meters in Hole A. MiDAS setup a cross-fault zone observatory using various state-of-the-art sensors to build up a long-term monitoring with close-in data for understanding of earthquakes nucleation, propagation and energy partition.