Hi SS Karthik

Here is some code it will help you.

<apex:page controller="MyJSController">

    <script type="text/javascript">
   
          function getRemoteAccount() {
         
             var accountName = document.getElementById('acctSearch').value;
            
                  MyJSController.getAccount(accountName, function(result, event){
                 
                      if (event.status) {
                     
                         // Get DOM IDs for HTML and Visualforce elements like this
                         document.getElementById('remoteAcctId').innerHTML = result.Id
                         document.getElementById("{!$Component.block.blockSection.secondItem.acctNumEmployees}").innerHTML = result.Phone;
                                                                               
                    } else if (event.type === 'exception') {
                          document.getElementById("responseErrors").innerHTML = event.message;
                    } else {
                          document.getElementById("responseErrors").innerHTML = event.message;
                        }
                   }, {escape:true});
             }
    </script>
   
    <input id="acctSearch" type="text"/>
    <button onclick="getRemoteAccount()">Get Account</button>
    <div id="responseErrors"></div>
   
    <apex:pageBlock id="block">
        <apex:pageBlockSection id="blockSection" columns="2">
       
            <apex:pageBlockSectionItem id="firstItem">
                <span id="remoteAcctId"/>
             </apex:pageBlockSectionItem>
            
            <apex:pageBlockSectionItem id="secondItem">
                <apex:outputText id="acctNumEmployees" />
            </apex:pageBlockSectionItem>
         </apex:pageBlockSection>
     </apex:pageBlock>
</apex:page>

global with sharing class MyJSController {

     public String accountName { get; set; }
     public static Account account { get; set; }
    
     public MyJSController() { } // empty constructor
        @RemoteAction
        global static Account getAccount(String accountName) {
            account = [SELECT id, name, phone, type, BillingCity FROM Account WHERE name = :accountName];
                      
             return account;
       }
}