Spyder error on variable explorer

I just installed Anaconda 4.5.8 and Spyder via both conda install spyder and sudo apt-get install spyder3.

I run Spyder via spyder using terminal and the variable explorer works perfectly. But when I run via Spyder3 at Application Menu, I got this error:

Spyder was unable to retrieve the value of this variable from the console.
The error mesage was: ModuleNotFoundError("No module named 'numpy'",)

I use a simple one like a = np.arange(0, 10, 1). It also fails on pandas DataFrame object.

It seems the system runs different Spyder from terminal and from Application menu. How do I fix this? I think it's too slow if I need to run it via terminal. I want the same Spyder just like the terminal's but launch it via Application Menu instead.

PS: I change the Spyder's Application Menu Python Interpreter to Anaconda's folder /home/hermonjay/anaconda3/bin/python3.6 and still got an error on the variable explorer.

Spyder's Anaconda version is 3.2.8 and Application is 3.2.6.