The brain has remarkable ability to integrate diverse sensory inputs from the outside world and generate appropriate motor commands to direct voluntary movements. The process by which brain establishes specific relationship between these sensory information and motor outputs, also known as the sensorimotor processing, is not only fundamental for precise control of movements, but also important for complex executive and cognitive functions. The sensorimotor processing requires perfect coordination of multiple brain regions including the sensorimotor cortex and the cerebellum. While extensive studies on these brain regions have been devoted to crystalize their specific cellular and circuit mechanisms for sensorimotor processing, how do these regions communicate and what are the roles of multi-regional computation remain unclear. We approach this fascinating question by studying the cortico-cerebellar communication in the context of several sensorimotor behaviours. We approach our overarching question using combined anatomical, behavioural, pharmacological, optogenetic and electrophysiological methods. Our recent projects aim to dissect the anatomical and functional organization of the cerebellar output neurons in the sensorimotor learning and motor planning paradigms.