Spanish citizen looking to move to australia sydney

Here is the official web site from the Australian Department of Immigration and Citizenship. You need to read this and see how the rules and regulations apply to your girlfriend.

Well, you can get her a subclass 300 visa. here are the requirements

• Applicants must intend to come to Australia to marry an Australian citizen or Permanent Resident;
• Applicants must have met their Australian sponsor personally, and MUST NOT marry prior to entering Australia;
• There can be no impediment to marrying under Australian Law;
• The plans of the couple to marry should be known by family and friends;
• Applicants must agree to marry within 9 months of entering Australia and will be granted a 9 month Temporary Visa for this purpose.