The presence of soft soil layers, loose sandy layers of saturation, the specific characteristics of tectonic and natural conditions of the region, as well as technical activity of human is the decisive factor in the formationand development processes and natural phenomena, geological, natural geological-technogenic in Hanoi. On the basis of the research and monitoring results, this paper analyzes and systematic roles of the formation, scale and characteristics of the processes and phenomena, to serve the utilization of undergroundspace in the Capital safety and high efficiency.