HDD for desktop computer is cheap and large in capacity.
Is there a way to connect an internal HDD of desktop to a notebook?
So that I can have huge storage capacity!

In this sort of case, it's dependent on your notebook.
If it has an IR-port (Infra red) then you could possibly get an optics connection that fits to your USB port on your computer if you don't have an IR-port on your pc.

You can then rig an IR LAN, where the two machines can communicate through the IR ports. This allows you to transfer information between machines.

(This is the method I used between my Psion and Laptop, I then have a LAN between the PC and laptop)

can you give me website which has details to teach me how to do it?

I actually want to know whether i can use the USB/com/LPT ports of my notebook to connect to an desktop HDD.

As I said it's dependent upon your Notebook.

If you name your notebook, or tell me what ports are on it, and what free ports you have I can find the info out and point you in the right direction.

my notebook is no branded one, clone notebook with intel celeron 1GHz.

has 1 com, LPT and USB port.