The enhanced heat transport in ion channel is observed as the temperature ratio Te/Ti increased from 1.0 to 2.2 in Experimental Advanced Superconducting Tokamak H-mode plasmas. Electron cyclotron resonance heating (ECRH) was applied to modulate Te/Ti within the range Te/Ti expected for ITER where electron heating is dominant. The ONETWO code presents increased ion thermal diffusivity. Trapped-Gyro–Landau-Fluid and Numerical Lie Transform simulations imply the development of TEM together with the reduction of ITG as Te/Ti increases. The reduction of ITG driven turbulence was supported by weakened density fluctuations measured by the poloidal correlation reflectometer (PCR). Conversely, after the removal of ECRH power, the behavior of turbulence also reverses. When Te/Ti reduces following the removal of ECRH power, PCR shows enhanced density fluctuations. The results from upgraded Collective Thomson Scattering diagnostics (CTS) shows simultaneously enhanced low-k (k) fluctuations and weakened intermediate-k (k) fluctuations as Te/Ti decreases. This study broadens the comprehension of evolution of turbulence and ion heat transport within the temperature ratio range Te/Ti.0, which is likely to occur in future tokamak like ITER.