db.bus_alarm_stat.aggregate(
[{ $project: {

? ?"busNo": "$busNo","groupId" :"$groupId","date":"$date","DANGEROUS_DRIVE":"$data.DANGEROUS_DRIVE","FATIGUE_DRIVE" : "$data.FATIGUE_DRIVE",
"OUT_AREA":"$data.OUT_AREA"}

},{$match:{"date":{"$gte": "2017-07-23","$lte": "2017-07-25"}}},{"$group":{_id:"$busNo",
DANGEROUS_DRIVE:{"$sum":"$DANGEROUS_DRIVE"},
FATIGUE_DRIVE:{"$sum":"$FATIGUE_DRIVE"},
OUT_AREA:{"$sum":"$OUT_AREA"},

? ?}
}

]
);

自己把它解決啦