Multisensory integration is a sensory processing mechanism that integrate input information from different sensory modalities, occurring during sensory reception and perception. However, the underlying neuronal circuit to integrate sensory information is still unknown. We featured anterolateral visual area (AL), which has axonal projection from primary sensory cortexes, and try to clarify the mechanism underpinning sensory information processing and integration in AL. We first visualized neuronal response to sensory input (whisker stimulation and auditory representation) in AL by in vivo Ca2+ imaging. It was observed that neuronal populations in AL responded to single or multiple sensory inputs. In order to examine how do neurons in AL enable multisensory responses, eGRASP technic was used to visualized synaptic connections from the primary sensory cortexes (S1BF, V1, and A1) to AL. Electrophysiological technique was also used to verify its functionality. Most of the AL neurons directly received synaptic inputs from the multisensory primary cortexes. We also investigate the role of sensory responsible neurons in AL. We checked the functional connectivity between sensory responsible neuron and the surrounding neurons in AL. A specific sensory responsible neuron was induced two-photon holographic stimulation and the response of the surrounding neurons was evaluated. It was suggested that diversity exists in the functional connectivity of sensory responsible neurons. In addition, we analyzed neuronal activities during the multisensory discrimination task. The sensory responsible neuronal population were changed after learning the task. Our study will contribute to the understanding of sensory dominance and psychiatric disorders with abnormal sensory integration.