Have a look at the UF documentation, which has a chapter on how to do installs like that: http://docs.splunk.com/Documentation/Forwarder/7.0.2/Forwarder/InstallaWindowsuniversalforwarderremo...
Post back here if that still leaves any specific questions!
Yes it is possible and recommended for coherency between your forwarders.
One of the most important configurations, the deploymentclient.conf that allows to later control everything from the deployment server.
Put that in an app orgalldeploymentclient with deploymentclient.conf in the /local directory and your're good to go.
All subsequent actions can be done through Deployment Server
Once I install the forwarder then only i can use deployment server to install apps and config right.For 70 server how is it possible to deploy universal forwarder.Is it any way to create fully configured package.
Well then for each server, put the installer in each machine, untar it, start splunk, copy the app that contains the deploymentclient.conf, restart splunk and you're done.
Any further doubts about it?