Excel add-in ha very limited capability. Therefore this option should be ruled out.
For full blown data migration - I would suggest using AIF. I have used AIF for 2 AX 2012 data migration projects so far. So I can guarantee it works very well. Recently MS released beta version of data migration tool kit which can be found online.
And of course there are some 3rd party tools available in the market. But I haven’t tried this yet.
Actually i am not talking about data migration. I have created one blank company AX 2012 and would like to load the data from table. Till now i am using Excel with its “Dynamics AX” add in but i would like to use other way if there is any way.
If you mean loading data from an old company to a new company carry out this process;
Create and Export Definition Group, Select the Tables you desire to rip data from for that export group, then launch the export. This way you can export data from the selected tables through your export definition group.
Create / access your new company, carry out the same process only do it for Imports and import the Exported file.