謝謝您給的信息和幫助！
1. 配偶國內，無綠卡，從來沒有來過美國， 也無稅號。
本人綠卡。結婚第一年，第一次遇到美國報稅問題。
-Your spouse needs to have a US tax ID (ITIN) if you want to include her in your tax return (i.e., file joint tax return).
2. 請問如何報稅？married filed jointly? married filed seperately?
-See this IRS link:
Nonresident spouse | Internal Revenue Service
配偶沒有美國的稅號。
-You need to apply for an ITIN (Individual Taxpayer Identification Number) for her. If you just file married file separately, then your spouse does not have to have ITIN.
3. 配偶在國內的收入需要報稅嗎？
-Yes if you want to file joint tax return. If you just file the tax return for yourself, i.e., Married Filing Separately (MFS) , your spouse's income is not included in your tax return, and she does not need to file tax return to IRS either.
4. 選擇married filed jointly, 本人的tax bracket要高？
-You need to calculate it by yourself and then, do comparison.
