Sorry, Gurus,
Finally we found the bug, there are some pull-up and pull-down resistors which should be removed, but not.
So after do so, we tested room tempereature 26.2 deg, and compared to a air-conditioner sensor's 26.4deg.
I am satisfied with the result.
BTW, do you think this TDK NTC can reach 1% measurement accuracy? from results, it seems very good.
But in datasheet, there are so many factors, so how to evaluate the accuracy from theory?
Best,
Tony Liu