Anti-bullying charity, Bullies Out wants a true understanding of what is going on.
Currently, schools must record all racist incidents but there is no legal requirement for them to record other types of bullying.
The Welsh Government said it was in the process of reviewing its policy "to make sure it is as strong as possible".
Bullies Out founder Linda James said: "We need to have that consistent definition of what exactly bullying is.
"We know that some schools are really proactive with their anti-bullying and they deal with it - but we also hear the stories that others are not.
"I think if there was some consistent reporting and recording procedure for all schools then maybe that would make it a lot easier for the schools in general."
Earlier this month, the funeral of 14-year-old Nyah James from Swansea was held. Her mother, Dominique Williams claims she took her own life as a result of being bullied at school.
She said: "It makes us feel terrible because we weren't there to stop it. To find out she was being bullied and going through such pain of her own and we didn't know nothing about it - that kills us every day."
Ms Williams added: "We feel like we've failed her. I think to myself, did I fail her as a mum because she wasn't able to come and talk to me - thoughts like that go through your head."
A South Wales Police spokesperson said officers were still investigating the matter.
In Northern Ireland, legislation making it a legal requirement for schools to record all reports of bullying was given Royal Assent last year and Bullies Out wants similar legislation in Wales.
Rob Williams, director of policy at the National Association of Head Teachers Cymru, said the call to record all bullying incidents was "understandable".
But he warned there was a danger that more focus will be put on the recording process and "not on the effective use of the data".
"Utilising the information to safeguard children is the key part here, and how this translates into positive action," he said.
A Welsh Government spokesman said schools must record all racist incidents - including racial bullying, but there is no legal requirement for them to record other types of bullying.
He added: "Our guidance - Respecting Others - sets out guidance and practical solutions on preventing and responding to incidents of bullying in schools.
"We are in the process of reviewing this policy to make sure it is as strong as possible."

They rang during a minute's silence at 15:06 BST, the moment the FA Cup semi-final between Liverpool and Nottingham Forest was halted on 15 April 1989.
Victims' families were joined by supporters and players at a memorial service at Liverpool's Anfield stadium.
Thousands of people sang the club's anthem You'll Never Walk Alone in memory of the 96 fans who died.
Actress and Liverpool fan Sue Johnston read the lyrics of The Beatles song In My Life before embracing Margaret Aspinall and Trevor Hicks, who both lost children at the disaster.
They were recently given CBEs by the Queen for their efforts to secure fresh inquests into the deaths of the 96 Liverpool fans.
Mrs Aspinall, who chairs the Hillsborough Family Support Group, said at the service: "We can't go away from here and see a job part done. We will get it done."
Liverpool captain Steven Gerrard and his Everton counterpart Phil Jagielka also released 96 red balloons at the event.
During the minute's silence, flags on civic buildings flew at half-mast and the Mersey Ferry sounded its horn while barriers at the Mersey tunnels were lowered.
Liverpool Mayor Joe Anderson said: "We will never forget those who died at Hillsborough, and this is a day for us to unite as a city and remember each one and also their families and friends left behind."
Before the service, a Liverpool fan said: "We are a band of brothers - it is sort of a nice thing to come here every year because all of us are mourning altogether, but it is an emotional day too."
The new inquests into the deaths of the 96 Liverpool fans will resume on 20 April at Birchwood Park, Warrington.
They started in March 2014 and are expected to continue until early 2016.
BBC News: Profiles of all those who died
There are calls for schools in Wales to be legally required to record all incidents of bullying.
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Bells in Liverpool tolled 96 times as the city remembered those who died 26 years ago in the Hillsborough disaster.