Multiscale interaction between the magnetic island and turbulence has been demonstrated through simultaneous two-dimensional measurements of turbulence and temperature and flow profiles. The magnetic island and turbulence mutually interact via the coupling between the electron temperature (T e ) gradient, the T e turbulence, and the poloidal flow. The T e gradient altered by the magnetic island is peaked outside and flattened inside the island. The T e turbulence can appear in the increased T e gradient regions. The combined effects of the T e gradient and the the poloidal flow shear determine two-dimensional distribution of the T e turbulence. When the reversed poloidal flow forms, it can maintain the steepest T e gradient and the magnetic island acts more like a electron heat transport barrier. Interestingly, when the T e gradient, the T e turbulence, and the flow shear increase beyond critical levels, the magnetic island turns into a fast electron heat transport channel, which directly leads to the minor disruption. PACS numbers: