You will need to follow the instructions in the 10.2.0.4 README
Please provide me step ........OR any link which will helpful for me
In other terms its called patchset application into your database home. Go to this note, assuming its linux, and do all steps until step 9 which is database upgrade.
10.2.0.4 Patch Set - Linux x86 64bit README [ID 559255.1]