how do i move my iphone 6 plus library photos to cloud?

Hey there MaryitaVega,

It sound slike you would like to store your photos in iCloud to open up some space on your iPhone. You could use iCloud Photo Library to do this, but if you have a lot of them the free 5 GB you get with an iCloud account may not be enoug. Here is some more information on using iCloud Photo Library, and keep these points in mind:

iCloud Photo Library FAQ - Apple Support

Can I use iCloud Photo Library to save space on my device?

iCloud Photo Library automatically keeps all your photos and videos in the original, high-resolution version. Follow these steps to choose how you store your photos and videos on your device:

• In iOS, tap Settings > iCloud > Photos or Settings > Photos & Camera, then select a storage setting.
• In OS X, click Photos > Preferences > iCloud, then select a storage setting.

If you turn on Optimize [device] Storage, iCloud Photo Library will automatically manage the size of your library on your device, so you can make the most of your device's storage and access more photos than ever. All of your original, full-resolution photos and videos are stored in iCloud while device-size versions are kept on your device. You can download the original photos and videos over Wi-Fi or cellular when you need them.

If you turn on Download Originals, iCloud Photo Library will keep your original, full-resolution photos and videos in iCloud and on your device. Download Originals is the default setting for iOS devices with the free 5 GB storage plan and for all Mac devices.

Thank you for using Apple Support Communities.

All the very best,

Sterling