I am developing one iphone application in which I want to implement real-time streaming function. I do not know how this is possible and what freamwork I should use. Please give me advice on this request. Thanks in advance.
You want to look at AVFoundation.framework for streaming a camera. In particular, the classes AVCaptureSession, AVCaptureDevice and AVCaptureDeviceInput.
There is technical Q & A at the same time: http://developer.apple.com/library/ios/#qa/qa2010/qa1702.html