Hi Dragon,
Welcome to the forum! Yes, you can build an InfoPath form that talks to the DB. When you design a form there is an option to "New From Data Connection". Choose this and specify your Access DB. You'll get a form that can receive and submit data from your Access MDB. Note: be careful of the datatypes. If the data connection doesn't show up as "submit-enabled" it's because there is a column which cannot be roundtripped (for example, memo). In that case, just go back and remove the column.
Hope this helps!
Patrick Halstead [InfoPath MVP]
InfoPathDev
Patrick Halstead
Project Manager at Qdabra