Migration of data from one crm 2011 online to other

Hello Friends,

We are using crm online 2011(old one) and we have some data in this.For some resaons we are not going to use this one in future.

So now we want to use another CRM online(new one) for our organisation.

Here we want move Whole our OLD CRM 2011 data to the NEW CRM 2011.

Can we move whole data in one step to our new crm?

(Note: Other than exporting each entity data to excel and again importing these files into new CRM)