My requirement I have one windows SharePoint services 2007 site list.
one SharePoint server 2013 site.

 1. I have to copy data from windows SharePoint services 2007 site list
    to SharePoint server 2013 site list.
 2. when ever data changes in windows SharePoint services 2007 site list
    data has to reflect into SharePoint server 2013 site list.

Could you please help on this.