As shown, the graphs formed by the Wolfram Mathematica was set by default as a bounding box like this:
How can I make the axis to show the original point like this:
Thanks!
You can use the option AxesOrigin:
AxesOrigin
Plot3D[x^2 + y^2, Element[{x, y}, Disk[]], AxesOrigin -> {0, 0, 0}, Boxed -> False, AxesLabel -> Automatic]
