How Can I Insert, Update the Account Records from Salesforce Vf page using Remote actions?

Hi Mallesh,

Definitely you can Update and Insert Account or any object Record using JavaScript Remoting.

check the below code:

//This is a javaScript Remoting function, you can use it to update/Insert Account
<script type="text/javascript">
function getRemoteAccount() {
    var account = {!accRec}; //Initialize an account in your controller like, Account accRec{get;set;}
    //Then set the values of this from your page
    Visualforce.remoting.Manager.invokeAction(
        '{!$RemoteAction.MyController.updateAccount}', 
        accRec, 
        function(result, event){
            if (event.status) {
                //Even account get updated, you will get the values in "result"
            } else if (event.type === 'exception') {
                document.getElementById("responseErrors").innerHTML = event.message;
            } else {
                document.getElementById("responseErrors").innerHTML = event.message;
            }
        }, 
        {escape: true}
    );
}
</script>

Apex:

In apex you can have this method.

@RemoteAction
Public Static void updateAccount(Account acc){
    if(acc != null){
       try{
           update acc;
       }catch(DMLException de){
           System.debug('DML Exception');
       }
    }
}

Hope this will be helpful!!!

Thanks