In order to better understand functional connectivity of rodent brain, we analyzed the functional magnetic resonance imaging (fMRI) data of the resting-state and forepaw electrical stimulation from lightly anesthetized rat at 9.4 T using cross-correlation analysis. The results showed that the primary somatosensory cortex (S1) and thalamus(Tha) were significantly positively activated, the caudate putamen nucleus(CPu) was significantly negatively activated during forepaw stimulation. The higher connectivity bilateral intra-sensory/motor cortices and bilateral intra- thalamus, but lower connectivity between sensory/motor cortex and thalamus were found during the resting state. Synchronized low frequency fluctuation (LFF) was observed between functionally related brain regions. In addition, the brain network of sensorimotor system showed small-world feature during resting-state. These results suggested that rodents have some similar properties with human in functional separation and integration during brain information processing, and strongly support the view that the underlying physiology of CNS is conserved across mammalian species.