Text message remotely monitoring is quite easy with some mobile apps. Some of these are paid and some are free for the time.
For addition features I suggest you to use paid apps as they will provide other smart things. Most of the apps has disclaimer that apps can only be used by parents and employers for their children and employee. Such apps are Mobile Spy( http://www.mobile-spy.com/ ) Phonesheriff( http://www.retinax.com/phonesheriff/ ) etc..