I plan to built a basket troley which always follow me in a distance any where i go. Which product should be used?
Search Google to see how others have done luggage, coolers and whatnot that follows a person. I have seen many such projects.
A Google search for "Arduino follow cooler".
A tip, use a meaningful title to your posts.
There may be people out there that know a great deal about the particular subject, so a post title that will attract their attention might help.
I suspect that not ALL forum member read ALL posts.
And another tip.
Basket trolley suggests shopping indoors, so you cannot rely on a GPS.
srnet:
I suspect that not ALL forum member read ALL posts.
I confirm that at least 1 forum member (me) does not read all posts.
PerryBebbington:
I confirm that at least 1 forum member (me) does not read all posts.
You're not allone….
Can't say I do but ...
The universal answer to this Frequently Posted Question is -
A piece of string!
And - I am not joking! 
A piece of string attached to a very flexible joystick.
mohdshukri_1961:
I plan to built a basket troley which always follow me in a distance any where i go. Which product should be used?
Is something like this you are looking for?
A project you might try to duplicate to get you started.
zoomkat:
A project you might try to duplicate to get you started.
https://www.youtube.com/watch?v=tAyWrJoVUbs
Sorry - dead link!
(But I can't fathom why it requires a sign in! 
)
"Sorry - dead link!"
The link opens for me with IE and Chrome, so maybe I'm special. 
Tie a piece of string around the basket and the other end around your waist .