how to saving flow water meter reading into EEPROM

You're going to need to make a better effort at communicating. I guess English is not your first language but that just means you need to be very thorough in explaining what you mean. If you use lots of words then even if a lot of it isn't clear to us, enough will be that we will get the meaning. If you use very few words then chances are we will have no clue what you're trying to say and the whole conversation will just be a waste of time for everyone.

What behavior are you expecting?

What behavior are you seeing that doesn't match what you expected?