This is one of the most vaguest answers I've posted on the forum so far simply because I don't know what operating system you are using nor do i know what version of db2 you are on.
First and foremost I would request you to please read the "Must Read Before Posting Thread" befor you do your next post.
To Connect to a remote instance you need to install an admin client on your machine. Then using the Config Assistant you can catalog the instance followed by the database to your local machine and go ahead and administer the same.
Here you need to install again the admin client and then go ahead and using commands first catalog the instance and then the database and you can adminster the instance.
For more details please refer to db2 documentation and also for more details on catalog command type db2 ? catalog on the command prompt once you have installed the client.
Ask the experienced rather than the learned