Professor Steve Molyneux, 54, was reported for putting the details on the social networking site by a colleague in February this year.
He told fellow Twitterers on one occasion how he sat "In the Gods passing sentence on the criminal fraternity".
Another time he wrote "Just keeping up whilst I'm (sic) court deciding on sentence. Sad or what?".
But the former Microsoft professor at Wolverhampton University was ordered before chairman of the bench Glyn Parry at a meeting on February 20 at Telford Magistrates Court.
He agreed not to post on Twitter but when he returned from holiday a week later a letter was waiting at his home.
The Shropshire Advisory Committee had written to him to tell him they wanted to meet with him over his behaviour.
It proved to be the final straw for the magistrate, who then resigned, claiming he considered being reported by a colleague a breach of trust.
He said all he had been trying to do was publicise what went on in the courts.
He stressed he never posted online while a hearing was in session or in an actual courtroom, instead using the retiring room for Twitter.
He said: "I haven't done anything wrong, I have served the community for 16 years for free and then this happens.
"I don't understand why a fellow magistrate would do anything like this to me.
"The powers that be have totally overreacted to this by about 300 per cent, they probably don't even understand the technology.
"What happened was I do have a following on Twitter and I use the technology to communicate and on one occasion I was sitting in Ludlow Magistrates Court.
"I did write the comment about sitting with the Gods, but I was referring to the height I was sitting at, not anything other than that.
"Another time I did send out a tweet just saying I was dealing with a remand case involving those accused of a local robbery.
"But all I ever did was mention what was said in open court and nothing that could prejudice a case or anything like that.
"I actually only reported what was happening in a case once, with only about five court-related Tweets other than that."
Social networking craze Twitter has exploded in popularity in recent months with over millions of users posting their every move online.
It has proved popular with a slew of celebrity supporters, including US President Barack Obama, Jonathan Ross, Stephen Fry and Russell Brand.
Prof Molyneux said he thought details of court cases should be posted online to give the public a better understanding of the law.
He said: "I would love to see a system where the courts are published online.
"The very fact that a colleague has done this to me makes me very sad indeed.
"I'm devastated not to be able to be a magistrate anymore because it's something I felt proud of doing within the community.
"All I thought was that by reporting certain things I would help get younger magistrates."
Stephen Molyneux 
Stephen Molyneux has resigned from his post of Justice of the Peace in Shropshire, England, after a fellow magistrate reported him for posting messages about a case on the social networking website Twitter.

Professor Molyneux, an IT consultant and former mayor of Oakengates, tweeted information about bail applications on an armed robbery case. He wrote 'just about to hear application from 3 robbers from Manchster as to whether to remand or not', '1st defendant. Conspiricy sic to rob TSB of £500,000. Good start - wrong previous convictions presented' and 'finished hearing bail. 3 refused for planning robbery of £480,000 from Tsb sic in Dawley, Telford'.

Molyneux claimed nothing that he said could have prejudiced a case and he only mentioned what had been discussed in open court. He also claimed he was trying to make the criminal justice system seem more transparent. He also stated he had never tweeted whilst in court, but only in the retiring room.

He resigned after he received a letter from the Shropshire Advisory Committee, which requested a meeting.