All your answers are on the this site http://www.runescape.com
But I will post it here
How does someone become a Player Moderator?
We keep track of potential Player Moderators through a variety of methods.
We review their behaviour in the forums, the number and quality of abuse reports sent in, how useful and friendly they have been to other players and any messages sent in to us from other players about their behaviour in the game.
The chances of a particular player becoming a Player Moderator is not based on their combat level or total level of their character but on the maturity and behaviour of all their characters in the game. This means that while you will not see a player fresh from Tutorial Island given Player Moderator status, you may see some with lower combat levels than you are expecting. Remember that we do investigate accounts fully before giving them Player Moderator status, so if you see the crown, the player will have earned it.
We do not give out details on how close someone is getting to becoming a Moderator but rest assured that if you are doing what is needed to become a Player Moderator then we will take notice.
If you do get selected to be a Moderator, a message will be sent to your account. Once you have accepted and the confirmation has been received, you will get your silver crown and Moderator abilities.
All our Player Moderators are hand-picked by Jagex staff. We DO NOT consider requests to become Moderators, so please do not send any in. The best advice we can give someone wanting to become a Player Moderator is to continue playing RuneScape in a good and honest way and report genuine abuse as and when you see it. In addition to this, having a positive presence on our official Forums would increase your chances of being identified as a trustworthy player.
We do not accept recommendations from players for possible Player Moderators so again, please DO NOT send these in to us. If a player proves themselves worthy, we will take note and may offer them a position as a Player Moderator.
If you have a previous punishment this does not necessarily end your chances of becoming a Player Moderator. We take into account the time at which an offense took place and the player's subsequent behaviour. If this indicates that they have learnt from their mistakes and have made a positive impact on the game, it can result in the player being considered for the role of Player Moderator.
HOPE I HELPED!