To share data between controllers, first create a service that will hold your data.

var myApp = angular.module("app.demo", []);

myApp.factory("Data", function(){
	return {
		message: "Hello, World"

Then you inject the factory into each controller.

myApp.controller("AppController1", ["$scope", "Data", function($scope, Data) {
	$ = Data;

myApp.controller("AppController2", ["$scope", "Data", function($scope, Data) {
	$ = Data;

Then create a html page with the following markup. You can see below there is two controllers receiving the input value and each one is bind to the same factory called Data.

<html ng-app="app.demo">
	<title>Learn AngularJS - Sharing Data Between Controllers</title>
	<script src=""></script>
	<script src="SharingDataDemo.js"></script>
	<div ng-controller="AppController1">
		<input type="text" ng-model="data.message" />
	<div ng-controller="AppController2">
		<input type="text" ng-model="data.message" />

This demo can be downloaded from my GitHub repository: