The first visit for next season was already agreed as part of the usual Future Tours Programme, while the second was organised as a replacement for the matches lost after New Zealand abandoned its tour of Pakistan in October.
"It's good to be going back," said NZC chief executive David White.
"Our respective chairmen, Ramiz Raja and Martin Snedden, had very fruitful and constructive discussions while in Dubai, further strengthening the bond between the two organisations."
PCB Chairman Ramiz Raja said: "This reflects the strong, cordial and historic relations the two boards have, and reconfirms Pakistan's status as an important member of the cricket fraternity."